Sam Allardyce reflected on a job well done after Blackburn earned a point against Chelsea at Ewood Park.

Didier Drogba's 22nd Barclays Premier League goal of the season had given Chelsea an early lead.

However, El-Hadji Diouf punished the Blues for failing to take their chances in the first half with a superb header 20 minutes from time.

Allardyce told Sky Sports: "It was really disappointing to go behind after a promising start.

"But then we held out well without really creating much quality in the final third.

"We put that right in the second half with the goal."

The Rovers boss made some tactical changes following the restart, which helped get the hosts back into the match.

"I told our wide men to push further on to their full-backs, because we were sitting too deep and could not get support to our frontman," Allardyce said.

"We moved the ball better on what was a difficult surface.

"I was really pleased with the second-half performance and deserved the draw in the end."

Allardyce was jeered for some of his substitutions during the second half.

The Blackburn boss added: "The result is what they wanted.

"The fans always feel you have got to throw caution to the wind.

"What we did in how we used the substitutes has got us the result, but the supporters are entitled to their opinion."

Allardyce maintained the result was not about doing a favour to his old friend Sir Alex Ferguson, the Manchester United manager.

"It is for us, not for Sir Alex," said the Rovers boss.

"It was a point towards our own safety and a good performance with a result."