'It wasn't the Nunez tournament we all hoped for'published at 13:02 12 July
Liverpool forward Darwin Nunez had a "point to prove" but struggled to make his mark at Copa America.
The Uruguay striker had been in fine form during World Cup qualifying, scoring five goals and making two assists in six games.
It was hoped he would carry that form into the Conmebol tournament but, as with his the Reds last season, missed a number of big chances and saw his side exit in the semi-final to Columbia on Wednesday.
"It's a real shame because for Uruguay and [Marcelo] Bielsa, he [Nunez] has been a different animal," Joyes told BBC Radio Merseyside.
"In the South American World Cup qualifiers, he scored five goals, outscoring Lionel Messi and leading the way. He came into this tournament with more of a point to prove and under Bielsa he has been more vocal about how he has loved that relationship.
"He scored a couple of goals in the group stages - a rather weak group - and missed a few chances. On Wednesday night, he missed three or four huge opportunities in the first half and fizzled out in the second half when Uruguay were chasing the game, so it wasn't the Darwin Nunez tournament we all hoped for."
The 25-year-old was also involved in an altercation with spectators in the stands after Uruguay's 1-0 defeat in Charlotte, North Carolina.
The incident broke out in a section of the stadium where many family members of the Uruguay players were seated and an investigation has now been opened by Conmebol.
"I'm not in a position to say what is going to happen to him," said Joyes. "I think it would be very unfortunate for him to have a ban considering circumstances in and around and looking to protect his family and loved ones."