Didier Drogba’s 22nd Premier League goal of the season had given Chelsea an early lead but for large parts of the game Blackburn defended well, led by the outstanding Christopher Samba, while 18-year-old debutant Phil Jones did not look out of place alongside him.
El-Hadji Diouf punished the Londoners for failing to take their chances in the first half with a superb header to pull Rovers level 20 minutes from time.
In the big game between England’s two most successful clubs, a second-half goal from Park Ji-Sung gave Manchester United a 2-1 win over Liverpool.
Fernando Torres had given Liverpool the lead after only five minutes with a towering header from Dirk Kuyt’s cross, but Wayne Rooney soon equalised.
The England star netted his 33rd goal of the season, by scoring from the rebound after his penalty had been parried by Pepe Reina.
Park headed home bravely from close range following a superb Darren Fletcher cross, but Liverpool still had time to grab a share of the points but Torres was unable to control Steven Gerrard’s cross. The ball looped up and Yossi Benayoun could only head straight at Edwin van der Sar.
In the day’s other game, Manchester City were 2-1 winners at Fulham. Roque Santa Cruz and Carlos Tevez scored for Man City before Danny Murphy pulled a goal back from the penalty spot.
City stay fifth but are now only two points behind fourth-placed Spurs with a game in hand. Roberto Mancini’s men are two points better off then Liverpool having played two games less.