Craig Bellamy fears Team GB's bid for Olympic gold could be ruined by his Liverpool team-mate Luis Suarez on Wednesday.
The hosts face Uruguay at the Millennium Stadium in Cardiff knowing that a draw would suffice to guarantee their place in the quarter-finals.
Uruguay lost to Senegal last time out but Bellamy knows Team GB must still be wary as Suarez is capable of turning a game in an instant.
"He is such a good player," said the Welsh striker ahead of the Group A clash. "The one thing about Luis is he can create something out of nothing.
"You may think he is going down a dead end and there is no way he can come out of it but he will chop it past something, put it through someone's legs and that makes him so dangerous.
"He is a wholehearted player, he will chase down and run. I have been fortunate to train with him day in day out, but also even more fortunate to play with the boy as well. He is a special talent."
Bellamy has played a key role for Team GB thus far, scoring in the opening draw against Senegal before providing two assists in the 3-1 victory over the United Arab Emirates on Sunday.
And the 33-year-old over-age pick is looking forward to keeping up his good form in his home town.
He added: "Cardiff is a place I know. It will be special. It will bring it home to me really where I have come from in my career.
"To me Cardiff is just a fitting place to play our last group game but hopefully it won't be the last."