It was a bad day at in the office for Paul Onuachu and Stephen Odey as Genk lost 1-0 on the road to Standard Liege in a Jupiler League match on Saturday.
Onuachu was handed a cameo, coming on as a 87th minute substitute, while Odey was an unused substitute.
The defeat was a temporary setback for the League champions in their title defence charge.
Currently seated sixth after 10 games, Racing are hanging on to the final spot for the championship play-offs and 10 points behind leaders Club Brugge.
The Super Eagles forward has scored four goals in five appearances for Genk since joining from Danish side FC Midtjylland.