By Elizabeth Hudson
BBC Sport in Athens
Great Britain continued their winning run at the Paralympic wheelchair rugby tournament thanks to a 32-30 extra-time win over world champions Canada.
Collins thought he had won the game in normal time
The sides were tied at 27-27 after Troye Collins had a late goal ruled out with three seconds to go which could have won the game for Britain.
But extra-time scores from Ross Morrison, Collins, Alan Ash and two from Justin Frishberg gave GB victory.
Collins and Ash led GB's scoring with 11 each and Frishberg added seven.
Britain were in contention throughout the game and were only a point behind at half-time.
They led 24-23 going into the final quarter and played superbly to get the win, marking them out as real medal contenders.
Collins admitted that, after the disappointment of his disallowed late goal, it had been difficult to raise his game for the three minutes of extra-time.
"My head went down when I thought I had lost it for the rest of the lads," he said.
"Everyone had worked so hard to get to this position but I had to refocus and I was so angry that my aggression got me through.
"I think this result shows the never-say-die attitude of the squad."
GB coach Darren Ransom was delighted with the victory, which puts his side in a good position to top their pool.
"It was a very tactical game but we had some good possession and I had faith that the lads would come back after going three points down," said Ransom.
"This was the biggest game we ever played and at times we made a few mental errors which could have cost us, but everyone did really well."