Didier Drogba
Illness prevented Drogba from making the bench in the 5-0 hammering of Swansea. Getty

Chelsea manager Jose Mourinho has confirmed Didier Drogba missed Saturday's 5-0 thrashing of Swansea City due to illness.

The veteran striker was a surprise omission from the match day squad as the Blues eased to a victory that saw them open up a five point lead on second placed Manchester City, who play Arsenal on Sunday.

But Mourinho confirmed via the club's official Twitter account that the 36-year-old absence was not injury-related, before adding there are no fresh injury concerns within his squad.

Drogba's presence was not missed as Diego Costa and Oscar both scored twice before Andre Schurrle added a fifth as Chelsea recorded their biggest win of the season at the Liberty Stadium.

Petr Cech enjoyed a relatively easy afternoon having been called into the side to replace Thibaut Courtois, who has an injured finger.

Speaking post-match, Mourinho provided an update on his injured Belgian while praising Cech's form.

"Courtois's finger is much better than it was last week," said Mourinho. "I was happy with Petr's performance. Cech is on the top of his game."

"He is confident, he is at the top of his potential. Even if you have an injured finger and are ready to play, you train in a different way as you want to protect the injury, so it was not difficult to pick Cech."

Mourinho went on to praise his side's 'perfect' performance as the club's pursuit of four trophies rediscovered its momentum.

"We were perfect. Everything went in our direction.

"The first half was very good. We were solid and recovered the ball in good positions. The decisions we made with the ball were good decisions. I'm happy with the points and quality of our football.

"The team still has to win cups in order to be remembered in 20 years. They are trying to the limit to make history."