The 32-year-old full-back only joined Les Verts on a deal until the end of the season on Wednesday having been released by Arsenal where his career had stalled due to a lack of first-team opportunities from their boss Arsene Wenger.
However, while Debuchy was thrust straight into coach Jean-Louis Gasset at the Stade de la Licorne, he didn’t disappoint with a first Ligue 1 goal in six years and he then featured in the build-up to the second goal scored by Remy Cabella during his 90-minute run-out.
“It had been a while since I last played so it was a bit tough for me at the end of the match but I am happy to have played a decisive role. It is an ideal debut, I scored and I tried to be solid defensively. I am pleased with the spirit shown by the team,” said Debuchy.
He added: “It was my first match and the rest of the squad have only been playing together for two or three matches, but the coach set out the instructions and us players discussed things well.
“If we continue like that we will be able to achieve great things, but we must not get carried away. We have a great match ahead of us next Friday (against Olympique de Marseille).”
Uwe Rosler was sacked by Fleetwood following a 3-0 reverse at Doncaster which condemned Town to a seventh straight defeat in all competitions.
Cambridge interim head coach Joe Dunne was pleased with how his side adapted to beat Grimsby 3-1.
Southend manager Chris Powell led the applause for Jason Demetriou after the right-back scored twice in the 3-1 win against Portsmouth at Roots Hall.
Morecambe boss Jim Bentley was the happier manager after Gregg Wylde's 90th-minute strike earned his side a point in their 1-1 draw with Forest Green.
Manager Gareth Ainsworth described Wycombe's 2-0 win at Cheltenham as a thoroughly professional performance.
Skipper Richard Wood scored the winner just before half time as in-form Rotherham pulled off a 1-0 victory at League One leaders Shrewsbury.