Everton loanee played against Celtic for Anderlecht.
He started for the Belgian side against Scottish champions Celtic, but was unable to stop his side slipping to a 3-0 home defeat.
It was a good opportunity for Onyekuru to show what he can do against a team who were also interested in the summer.
The 20-year-old played all 90 minutes of the defeat, but was starved of service in attack.
He did not manage to have a shot at goal, although did manage to create one chance for a teammate.
The Nigerian managed just 36 touches, and won one aerial duel.
Everton beat heavy competition to sign him from Eupen in the summer, but needed to send him out on loan as he was not eligible for a work permit.
On the basis of last night, he is not quite ready to make an impact in the Premier League just yet.
It must be noted that Anderlecht are in a transition period, having lost key player Youri Tielemans in the summer to Monaco, they fired their manager after poor results earlier this month.
Here is a look at how Twitter reacted to Onyekuru's performance...
Onyekuru has got a long way to go, lightening fast but has looked very ordinary tonight. Definitely one for the longer term— Barry Johns (@1878bigblue) September 27, 2017
Looks very tidy on the ball and pacy with it does Onyekuru.— Andy (@ABLE1986) September 27, 2017
So Henri onyekuru can't even score against Celtic— cus1967 (@cus1967) September 27, 2017
Impressed by Henry Onyekuru for Anderlecht tonight. Looks very lively. #efc— Neil M (@nismoneil) September 27, 2017
I don't. think Belgium football will help improve henry onyekuru talent. anderlecht coach should sack for good football reasons— henryokoja (@henryokoja1) September 27, 2017
Onyekuru looks good for anderlecht— james gavan (@james_gavo3) September 27, 2017
Ohhh, Onyekuru almost played in but his touch is poor— TJDSBlog (@TJDSBlog) September 27, 2017
Based on this game, thank god we didn't splash the cash on that Henry Onyekuru boy... £7mil?— Gastro Celtic (@Gastro_Celtic) September 27, 2017