Chelsea v Manchester Untied: how their clashes have defined Premier League title races Premier League winners: Man Utd Did their matches matter?: No. United won the title by a comfortable margin of nine points. Chelsea 2 - Man Utd 1, March 2011 - Chelsea's faint title hopes remained alive thanks to Luiz and Lampard goals. Man Utd 2 - Chelsea 1, May 2011 - Two goals in the first half were enough for United to win match that all but guaranteed 19th title. Premier League winners: Chelsea Did their matches matter?: Yes. Chelsea's victory in April saw them leapfrog United and they went on to win the title by a point. Chelsea 1 - Man Utd 0, Nov 2009 - Terry header gave Chelsea a win that extended their lead at the top to five points. Man Utd 1 - Chelsea 2, April 2010 - Cole and Drogba combine to stun United as Chelsea took control of title race. Nearly there: Chelsea celebrate a crucial win at Old Trafford (Photo: PA) Chelsea finished seven points adrift of title winners United. Chelsea 1 - Man Utd, Sept 2008 - Late Kalou equaliser preserved Chelsea's unbeaten home record in even affair. Man Utd 3 - Chelsea 0, Jan 2009 - Comprehensive victory that heaped pressure on then-leaders Liverpool. Premier League winners: Man Utd Did their matches matter?: Yes and no. United's victory in September handed them three points and they won the title by two. But Chelsea's win in April took the title race to the final day of the season. Man Utd 2 - Chelsea 0, Sept 2007 - Mikel sent off as United capitalised on Chelsea unrest following Mourinho's shock exit. Chelsea 2 - Man Utd 1, April 2008 - Michael Ballack brace won it for Chelsea as Blues kept title hopes alive. United won the title by six points and their goalless clash in May was a dead rubber. Man Utd 1 - Chelsea 1, Nov 2006 - Honours even at Old Trafford after Carvalho cancelled out Saha's opener. Chelsea 0 - Man Utd 0, May 2007 - A nothing match that meant nothing. Chelsea should have won though. Cruise control: Wayne Rooney and Ronaldo share a laugh after winning the title (Photo: ACTION IMAGES) Chelsea's victory over United in April confirmed their status as Premier League winners for the second season in a row. Man Utd 1 - Chelsea 0, Nov 2005 - Fletcher goal ends Chelsea's 40-match unbeaten run. Chelsea 3 - Man Utd 0, April 2006 - Gallas, Cole and Carvalho added the gloss to Chelsea's Premiership success. Premier League winners: Chelsea Did their matches matter?: No, Chelsea won the title by 12 points and had it wrapped up before their second meeting. Chelsea 1 - Man Utd 0, Aug 2004 - Early Gudjohnsen goal the difference as Chelsea saw off depleted United. Man Utd 1 - Chelsea 3, May 2005 - Chelsea set new points record in comeback victory at Old Trafford.