John Terry's lawyers asked Tuesday for the racial abuse case against the former England football captain to be dismissed from court, calling it "weak and tenuous."
The Chelsea captain is accused of calling Queens Park Rangers player Anton Ferdinand a "fucking black cunt" during a match between Chelsea and QPR on October 23 last year.
Terry, standing trial at Westminster Magistrates Court in London, denies committing a racially aggravated public order offence.
The 31-year-old's lawyer George Carter-Stephenson applied to judge Howard Riddle to dismiss the case, saying Ferdinand was an unreliable witness.
Lip-reading experts agreed it was impossible to clarify what was said at the key moment from the footage, he added.
The case was "so weak and tenuous it does not warrant it going any further," he said.
Prosecutor Duncan Penny will respond to the application before Riddle rules. In evidence heard earlier on Tuesday, the second day of the trial, Terry said he suffered continual abuse during football matches.