Büttner moved into an attacking left-sided position with Rooney offering more support to the isolated van Persie. Rooney was soon into the thick of things and misdirected a header, off balance, following a cross by Valencia as the Reds tried to build some momentum.
However, Chelsea kept pressing and Mata was close to meeting Lampard's ball into the box and three corners in succession were defended capably. As the game entered the final 10 minutes, Rafael's run led to Ivanovic going close to putting through his own net but any thoughts that the Londoners would tire after their recent fixture congestion were looking unfounded.
Evra's shove on Mata produced another free-kick in a similar position to earlier in the half and Luiz clubbed the dead-ball into the crowd but the winner was just around the corner. Referee Webb failed to whistle when Rooney was toppled over by Ramires and the Brazilian was heavily involved in the move that led to Mata finding himself in space inside the area. The Spaniard's shot took a touch off Jones and crept in at the far post.
Rafael was dismissed with two minutes left after kicking Luiz, becoming the first Red to be sent off in the Barclays Premier League this season. It looked a harsh decision by Webb but it left the Reds a man light and forced into accepting a rare home reverse.