Henrikh Mkhitaryan has already been impressed with Manchester United's trio of new signings and believes they have made the squad stronger.

Two of United's three summer signings, Romelu Lukaku and Nemanja Matic, caught the eye as they opened the season with an impressive 4-0 win over West Ham at Old Trafford on Sunday.

Lukaku, the club record £75million buy, scored the opening two goals while midfielder Matic, bought for £40million from champions Chelsea, was named man of the match.

Manchester United vs West Ham player ratings Show all 23 1 /23 Manchester United vs West Ham player ratings Manchester United vs West Ham player ratings <b>Manchester United:</b> David de Gea - 6/10 Rarely called into action, but was equal to the few efforts West Ham unleashed at him. Getty Manchester United vs West Ham player ratings Antonio Valencia - 7/10 Pinned back early on, but made waves down the right as the game opened up. Getty Manchester United vs West Ham player ratings Phil Jones - 7/10 Often moved to put his body on the line. Could still be an asset if he can stay fit. Getty Manchester United vs West Ham player ratings Eric Bailly - 6/10 His determination occasionally spilt over to the kind of carelessness that saw him booked. Getty Manchester United vs West Ham player ratings Daley Blind - 8/10 Impressed on the left, getting forward at will to join the attack. Getty Manchester United vs West Ham player ratings Nemanja Matic - 10/10 Absolutely superb in midfield. He protected his defence, won back possession at will and begun many of United's best moves. Could he be the missing piece of Mourinho's jigsaw? Getty Manchester United vs West Ham player ratings Paul Pogba - 8/10 Strong without the ball and played some incredibly clever passes with it. Already an improvement on last season's performances. Getty Manchester United vs West Ham player ratings Henrikh Mkhitaryan - 8/10 A creative force. He set up two goals and was unlucky not make the scoresheet himself. Getty Manchester United vs West Ham player ratings Juan Mata - 7/10 Some typically smart touches in and around the box but guilty of making a couple of wrong choices. Getty Manchester United vs West Ham player ratings Marcus Rashford - 8/10 Troubled Obiang with his speed down the left and was only denied a stunning goal by the inside of the post. Getty Manchester United vs West Ham player ratings Romelu Lukaku - 9/10 A dream debut double for the £75m man. His pace and power were too much for the West Ham defence. Getty Manchester United vs West Ham player ratings Subs: Anthony Martial - 8/10 Reminded Mourinho of his potential with a goal and an assist in the last ten minutes. Getty Manchester United vs West Ham player ratings <b>West Ham:</b> Joe Hart - 5/10 His return to Manchester proved to be a disappointment but he showed some quality in the early stages of the contest. Getty Manchester United vs West Ham player ratings Pablo Zabaleta - 5/10 Another who started well, but began to look his age as the pace of United's front line ran him ragged. Getty Manchester United vs West Ham player ratings Winston Reid - 6/10 Troubled by Lukaku's presence, he at least kept his individual discipline in an unruly defence. Getty Manchester United vs West Ham player ratings Angelo Ogbonna - 5/10 Made some vital clearances in the first half, but wilted as West Ham lost their shape. Getty Manchester United vs West Ham player ratings Arthur Masuaku - 4/10 Hung out to dry after his antics in the lead to United's second, he was unconvincing at best. Getty Manchester United vs West Ham player ratings Mark Noble - 5/10 The captain had neither the strength or awareness to compete with Pogba, Matic, Mata and Mkhitaryan i midfield. Getty Manchester United vs West Ham player ratings Pedro Obiang - 5/10 Caught in possession in the build-up to the opener, he never recovered to make amends. Getty Manchester United vs West Ham player ratings Edimilson Fernandes - 5/10 Fired West Ham's best chance straight at De Gea and was replaced on the hour mark. Getty Manchester United vs West Ham player ratings Andre Ayew - 5/10 Rarely in the game as Matic cut off the supply line to West Ham's forwards. Getty Manchester United vs West Ham player ratings Marko Arnautovic - 5/10 A quiet debut, he almost stole a goal with a looping header that clipped the crossbar. Getty Manchester United vs West Ham player ratings Javier Hernández - 6/10 Eager to impress on his return to Old Trafford, he kept fighting to the end. Getty

The third new player, £31million defender Victor Lindelof, was not included in the matchday squad as manager Jose Mourinho wants to give the Swede more time to settle.

Mkhitaryan, asked initially about Matic's display, said: "It was not only Matic. I want to mention as well the other two new signings, Lindelof and Lukaku. They are very good players. They are, I think, Manchester United players.

"Matic does a big job on the pitch. He tries to recover all the balls. He defensively does a big job. Lukaku scored his goals and Lindelof is still going to have time to show himself. So I want to say all the players are good signings and they are going to help us a lot."

Matic brought a commanding presence to United's midfield and, at 29, looks in prime condition. Mkhitaryan admits he is surprised Chelsea sold him.

Romelu Lukaku scored twice on his United debut after his £75m move from Everton (Getty)

"Actually I am (surprised)," he said. "But at the same time I am very happy that we have got him."

United won the League Cup and Europa League last season but are hoping to challenge for the Premier League again after three underwhelming campaigns.

How Manchester United could line up next season Show all 12 1 /12 How Manchester United could line up next season How Manchester United could line up next season How could United line up? Jose Mourinho's side have been linked with dozens of new signings, but who is most likely to line up for the club in time for the start of the 2017/18 season? Getty How Manchester United could line up next season Goalkeeper – David De Gea Reports in Spain now suggest De Gea will stay at United once again as Real Madrid have failed to convince the club to sell. Getty How Manchester United could line up next season Right back – Serge Aurier Serge Aurier is believed to be in advanced talks with Manchester United ahead of a £25m move to Old Trafford. However visa issues are delaying the move so far. Getty How Manchester United could line up next season Centre-back – Eric Bailly Bailly had a phenomenal first season at United and looks like he will be the bedrock of Mourinho’s defence for the foreseeable future. Getty How Manchester United could line up next season Centre-back – Victor Lindelof Victor Lindelof has joined the club from Benfica and will start in the heart of United's defence. Getty How Manchester United could line up next season Left-back – Danny Rose Danny Rose is pushing for a move north and Manchester United are known to be interested in the left-back as Luke Shaw's future grows even more uncertain. Getty How Manchester United could line up next season Midfield - Ander Herrera A fan favourite at Old Trafford, Herrera's tenacious performances in the middle of the park last season saw his stock rise immeasurably. With Wayne Rooney's days numbered, the Spaniard may be in line to take the captain's armband. Getty How Manchester United could line up next season Midfield – Nemanja Matic The signing of Matic is one that screams not only of the need for discipline in the heart of this United team, but one that reiterates how the Portuguese is looking for players who can help him win now, not a couple of years down the line. Getty How Manchester United could line up next season Midfield – Paul Pogba Mourinho is known to want to bring in a defensive midfielder in order to free up the Frenchman to operate further up the field. Getty How Manchester United could line up next season Left-wing - Marcus Rashford The young English forward has done enough to earn Mourinho's trust and should be used in the first XI far more next term. Getty How Manchester United could line up next season Right-wing – Ivan Perisic United are only willing to spend £35m on Perisic but Inter want £50m. The club are still confident they can push the deal through. Getty How Manchester United could line up next season Striker - Romelu Lukaku Mourinho has prioritised a new No.9 this summer following Zlatan Ibrahimovic's season-ending injury and subsequent release and has opted for Lukaku as his top choice. Getty Images

Yet for United it is never just about results. Fans also want to see the team play with style and one of their chief criticisms in recent years has been the side has been too pedestrian.