Team GB boss Stuart Pearce felt nerves were responsible for his side's disappointing start to the Olympics after the 1-1 draw with Senegal.
Moussa Konate's late strike cancelled out Craig Bellamy early opener to deny Team GB a winning start at Old Trafford.
Senegal deserved the draw with Team GB failing to dominate their opponents and Pearce felt his side's performance was affected by nerves.
"I saw nerves before the game," said Pearce. "A lot of our players have played Premier League football, but this cranked it up a bit.
"Late on in the game we ran out of a bit of gas and it went end to end at that stage.
"We would have liked to have gone on [and scored more] after getting our noses in front, but we are still in the mix, it's going to be a wide open group, and we have to take confidence from this.
"Physically, Senegal were a bigger side than us and more powerful. But that's not an excuse, we will come away from the match, have a good look at it and see where we go from there."