Skipper Brian O'Driscoll got over for Ireland's opening try
Ireland (20) 32
Tries: O'Driscoll, Trimble, Easterby, penalty try, Flannery
Cons: O'Gara (2)
Pen: O'Gara O'Driscoll, Trimble, Easterby, penalty try, FlanneryO'Gara (2)O'Gara Namibia (3) 17
Tries: Nieuwenhuis, van Zyl
Cons: Wessels (2)
Pen: Wessels
Ireland secured an expected victory in their opening World Cup match but were far from convincing against Namibia.
Despite a fourth-minute try from Brian O'Driscoll, the Irish only managed two further touchdowns by Andrew Trimble and Simon Easterby before half-time.
Ireland were awarded a penalty try early in the second half but were hit by Namibian tries scored by Jacques Nieuwenhuis and Piet van Zyl.
Replacement hooker Jerry Flannery got over for a late try for Ireland.
Coach Eddie O'Sullivan is bound to be concerned about Ireland's scrappy display and the number of passes which failed to go to hand.
They have a lot to work on before facing Georgia on Saturday.
It had all started so promisingly when O'Driscoll chipped ahead, ran onto his kick and shrugged off Ryan Witbooi to score his 30th Test try.
O'Gara converted and then landed a penalty in the 17th minute to ease Ireland into a 10-0 lead.
Andrew Trimble gathered O'Gara's kick top score a try
The fly-half set-up Ireland's second try on 29 minutes by taking a tap penalty and kicking to the right corner where winger Trimble gathered before touching down.
Namibia fly-half Emile Wessels landed a long-range penalty on the stroke of half-time.
Four minutes into the second half referee Joel Jutge responded to two collapsed scrums by awarding Ireland a penalty try and the Namibians could have few complaints.
The score secured a bonus point but the Irish were struggling to put Namibia away.
Heading into the final quarter, it was the Africans who were playing with greater conviction big blindside forward Nieuwenhuis thundered over for a 61st-minute try.
The Bordeaux crowd were roaring with approval as van Zyl quickly added another touchdown.
Ireland got the final score when Flannery seemed fortunate to be credited with a try in the left corner.
Ireland: G Dempsey: A Trimble, B O'Driscoll, capt, G D'Arcy, D Hickie; R O'Gara, P Stringer; M Horan, R Best, J Hayes, D O'Callaghan, P O'Connell, S Easterby, D Leamy, D Wallace.
Replacements: J Flannery, N Best, M O'Kelly, S Best, I Boss, P Wallace, G Murphy.
Namibia: T Losper; R Witbooi, B Langenhoven, P van Zyl, H Bock; E Wessels, E Jantjies; K Lensing (captain), H Horn, J du Toit, W Kazombiaze, N Esterhuize, J Nieuwenhuis, H Senekal, J Burger.
Replacements: J Meyer, J Redelinghuys, M MacKenzie, T du Plessis, J van Tonder, LW Botes, M Africa.
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In the pool stage of the 2007 Rugby World Cup, eight teams played their first matches of the tournament.  Wales came from behind to defeat Canada after a first half scare. South Africa comfortably defeated Samoa, while Ireland beat Namibia and Scotland beat world cup debutants Portugal.
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Canada score a try against WalesImage:  ManuelWales prepare for a scrumImage:  Manuel
In Pool B, Wales took an early lead against Canada with three penalties from James Hook. However Wales struggled throughout the first half, and tries from Canadians Jamie Cudmore, Craig Culpan and Morgan Williams meant that Canada led 17-9 early in the second half.

Wales improved in the last half hour of the match. Tries from Alun Wyn Jones, Colin Charvis and a double from Shane Williams regained the lead for Wales.
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F DanySiva tauImage: F Dany
In a very physical encounter in Pool A, South Africa comfortably defeated Samoa. The South Africans led 9-0 after fifteen minutes with Percy Montgomery kicking three penalties. Samoa scored their only points of the match soon afterwards when Gavin Williams scored and converted a try. 

South Africa led 21-7 at half time after tries from Bryan Habana and Percy Montgomery. They controlled the second half, and tries from Jaque Fourie, J P Pietersen, a second from Percy Montgomery and a second half hat-trick from Bryan Habana completed South Africa's victory.
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Portugal, making their first ever appearance in the world cup, faced Scotland in Pool C. Rory Lamont scored two quick tries for Scotland followed by a try from Scott Lawson to give Scotland a 21-0 lead. Pedro Carvalho scored Portugal's first world cup try, and Duarte Cardoso Pinto converted as well as scoring a penalty. However Scotland were too strong and Rob Dewey, Kelly Brown, Dan Parks, Hugo Southwell and Ross Ford all scored tries for Scotland. Dan Parks scored 15 points from his try and five conversions.
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Pool D saw Ireland take on Namibia. Despite a messy performance from Ireland, they led at half time thanks to tries from Brian O'Driscoll, Andrew Trimble and Simon Easterby. Early in the second half, Ireland were awarded a penalty try when two scrums collapsed, but Namibia responded with tries from Jacques Nieuwenhuis and Piet van Zyl. Towards the end of the match Jerry Flannery scored Ireland's fifth try to secure the win.