Alexis Sanchez has revealed Lionel Messi was in tears in the dressing room after Barcelona were knocked out of the Champions League by Chelsea in 2012.
Messi missed a penalty in the second leg at the Camp Nou as goals from Ramires and Fernando Torres earned 10-man Chelsea a 2-2 draw and a place in the final against Bayern Munich.
Sanchez started the game for Barca, who took a 2-0 lead to go ahead in the tie after losing 1-0 at Stamford Bridge in the first leg.
Chelsea had John Terry sent off in the first half but regained the lead in the tie when Ramires chipped Victor Valdes before Messi hit the bar from the spot.
Torres confirmed the Premier League's side place in the final in stoppage time, leaving Messi distraught in the changing room.
"In the Barcelona dressing room after the Chelsea game, I saw Leo cry," Sanchez told Sky Sports. "That's because players demand so much from themselves. People don't see that."
In eight meetings against the English side, Messi has never scored against Chelsea, who went on to win the Champions League in 2012.
His only win against Chelsea came in 2006, his first game against them, when Barca won 2-1 at Stamford Bridge.
Barcelona travel to Stamford Bridge next week for the first leg of their Champions League round-of-16 tie and Messi will look to end his drought against the Premier League champions.