Pedro and Diego Costa deliver for Chelsea; Samir Nasri strikes for Man City – EPL action in pictures

Chelsea keeper Thibaut Courtois stops James Morrison, obscured, from scoring his penalty attempt early in Chelsea's win over West Brom on Sunday. Justin Tallis / AFP

Chelsea's Pedro celebrates after scoring their opening goal to go up 1-0 against West Brom on Sunday in a victory at The Hawthorns. Will Oliver / EPA

Chelsea's Diego Costa celebrates with teammates after his goal put the team 2-0 up against West Brom on Sunday in their 3-2 win in the Premier League. Will Oliver / EPA

Thibaut Courtois of Chelsea fails to stop West Brom's opening goal by James Morrison on Sunday to make it 2-1 in their Premier League contest at The Hawthorns. Julian Finney / Getty Images

Chelsea's Cesar Azilicueta celebrates after scoring his team's third goal to go 3-1 up in their eventual 3-2 win over West Brom on Sunday. Will Oliver / EPA

Chelsea's John Terry shown on Sunday as he came off the pitch following a red card against West Bromwich Albion. Carl Recine / Action Images / Reuters

Chelsea manager Jose Mourinho reacts during their 3-2 win against West Bromwich Albion at The Hawthorns on Sunday in the Premier League. Carl Recine / Action Images / Reuters

Everton's John Stones looks to play the ball against Manchester City on Sunday during their Premier League contest at Goodison Park. Oli Scarff / AFP

Manchester City's Aleksandar Kolarov celebrates after scoring the team's opener to go 1-0 up against Everton on Sunday in their victory at Goodison Park. Oli Scarff / AFP

Romelu Lukaku of Everton reacts with teammate James McCarthy during their loss to Manchester City on Sunday. Alex Livesey / Getty Images

Samir Nasri celebrates after scoring Manchester City's second goal on Sunday in their 2-0 victory over Everton. Andrew Yates / Reuters

Oriol Romeu of Southampton challenges Allan-Romeo Nyom of Watford during their goalless draw on Sunday at Vicarage Road. Richard Heathcote / Getty Images

Watford's George Byers reacts after missing an opportunity on Sunday against Southampton. Leon Neal / AFP

Watford's Sebastian Prodl, left, tackles Southampton's Shane Long during their Premier League contest on Sunday. Leon Neal / AFP

James Ward-Prowse, No 16, of Southampton looks to play the ball against Watford on Sunday at Vicarage Road. Tom Dulat / Getty Images

Images from Sunday's play in the Premier League, with Chelsea travelling to West Bromwich Albion and winning 3-2 behind goals from newcomer Pedro, Diego Costa and Cesar Azpilicueta; another defender scoring a crucial goal as Aleksandar Kolarov opened for Manchester City and Samir Nasri added the finishing touch in a 2-0 win over Everton; and Watford and Southampton playing a goalless draw. Click the arrows below to scroll through the photos.

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