Throughout the season former player Clive Walker provides radio and TV commentary on Chelsea's games. Here he selects five aspects from Saturday's contest with a dramatic ending that caught his eye…

Chelsea scored the opening goal at a good time but didn't go on from that in the second half. West Brom played five men in midfield and tried to block us out through the middle so we had to go wider, and from their some of the deliveries in weren't the best. On top of that, the West Brom centre-backs Gareth McAuley and Jonas Olsson were at the top of their game so we found it hard to create chances.

We said that when Samuel Eto'o scored his first goal he would continue to bang them in as he has been goal machine for his whole career. This league is a challenge for him at his age but he is showing the knowledge he has gained as a goalscorer and looks to have more confidence and fitness now. Jose Mourinho knows now he can rotate his strikers if he needs to.

West Brom upped the tempo and their pressurising was more intense after half-time because they were a goal down. They played a little higher up the park believing that Eto'o and Oscar weren't going to run in behind. Chelsea weren't getting the penetration which keeps their backline deep so they were able to squeezed up, their midfield engaged more with ours and that put us on the defensive.

In the build-up to West Brom's second goal, Branislav Ivanovic may have felt he should have had a free-kick but when it wasn't given, we didn't recover and we normally do that well. When one of the defenders is caught out of position, normally we are very good at being solid as a three with a midfielder dropping in to help. Unfortunately Gary Cahill also slipped and Petr Cech will be disappointed with the way he reacted to the shot.

Changes were made after Chelsea conceded each goal. Demba Ba added some strength up top and when Juan Mata came on, so did John Mikel Obi because he could do the defensive side of things which released Ramires more to go forward. It worked to a point as it was Ramires challenged inside the area for the penalty. The reaction from the manager and players was positive but it was the fact we were 2-1 down that was the disappointment after going a goal up.

Clive Walker is part of the commentary team for games on this season. Go to our Matchday Live section or hear it via our Mobile App.