The British racer took the race two victory and the early lead of the Championship at Paul Ricard on Sunday.
The American won the opening race of the 2018 Eurocup season in France after jumping polesitter Max Fewtrell at the start.
Max Fewtrell led from start to finish in Sunday's second race of the weekend at Paul Ricard to take over the lead of the Eurocup standings.
A better getaway gave Logan Sargeant the advantage over polesitter Max Fewtrell at Paul Ricard on Saturday, with the American securing his maiden Eurocup as a result.
Three of the Renault Sport Academy quartet qualified inside the top five at Paul Ricard for Saturday's first race of 2018, with two of those part of R-ace GP's 1-2-3 Qualifying effort.
The British racer will start Sunday's second race of the season from pole position at Paul Ricard.