Atletico Madrid coach Diego Simeone described Tuesday's scoreless draw with Champions League semi-final opponents Chelsea as an "intense" affair and admitted the result favours the Blues ahead of next week's second leg at Stamford Bridge.
The Liga leaders were the far more enterprising of the two sides but struggled to penetrate a resilient visiting back four, despite the constant stream of crosses into the English outfit's 18-yard box.
Diego Costa saw a volleyed effort charged down in the first half, while Gabi's free-kick from distance was well held by substitute Mark Schwarzer, who replaced the injured Petr Cech in the first half.
Chelsea defender John Terry also came off in the second period with an ankle problem, but Simeone feels the visitors will be the happier of the two sides after a 0-0 draw in the Spanish capital.
"It was a tough game where nobody could get an advantage," said the Argentine.
"We could not find the goal that would have won the match. It was an intense game with both sides fighting to get to the final.
"They have the advantage with this draw, but whoever wins the next game will go to the final."