United States midfielder Edu, 23, played no part in the 4-1 Group G defeat but watched the match at Ibrox and says he was targeted by his own club's supporters as he left the stadium.

Edu wrote a message on his Twitter feed which read: "Not sure what hurt more: result last nite or being racially abused by couple of r own fans as I'm getting in my car."

The Rangers Supporters Trust condemned anyone who might have abused Edu, who has been out all season with a knee injury.

RST spokesman David Edgar told Press Association Sport: "We would absolutely condemn that if that's the case.

"These are not Rangers fans and they should be caught and prosecuted to the full extent of the law."