Frank Lampard expects Timo Werner to fire again soon after more missed chances in Chelsea's win over West Ham

German striker has gone nine games without a goal and was guilty of missing more chances on Monday night

Timo Werner tackles and injures goalkeeper Lukasz Fabianski during the Premier League match between Chelsea and West Ham United at Stamford Bridge. EPA

Timo Werner runs past West Ham defender Fabián Balbuena. AFP

Timo Werner looks on through the rain during the match at Stamford Bridge. AFP

Thiago Silva celebrates scoring Chelsea's first goal with Mason Mount. Reuters

Chelsea manager Frank Lampard issues instructions during the game. EPA

Tammy Abraham scores Chelsea's third goal against West Ham. Reuters

Chelsea's Mason Mount with West Ham United's Declan Rice after the match. Reuters

Tammy Abraham celebrates after scoring for Chelsea against West Ham. EPA

Tammy Abraham celebrates after scoring for Chelsea against West Ham. EPA

West Ham's Mark Noble challenges for the ball with Chelsea's Mason Mount. EPA

West Ham's Vladimir Coulfal and Chelsea's Tammy Abraham challenge for a header. EPA

Tammy Abraham and Christian Pulisic link up during Chelse'as match against West Ham. AP

Chelsea goalkeeper Edouard Mendy attempts a save on West Ham's Jarrod Bowen. Reuters

Thiago Silva celebrates with teammates after scoring for Chelsea against West Ham. EPA

Thiago Silva scores Chelsea's opening goal against West Ham. EPA

Chelsea's Tammy Abraham gestures during the game against West Ham. Reuters

Chelsea manager Frank Lampard says he has no concerns over Timo Werner's goal drought and is sure the German striker will soon rediscover his form.

Werner, a £45 million ($60m) summer signing from RB Leipzig, recovered from a slow start to his Chelsea career by scoring seven goals in seven games across all competitions, but has not found the target in his past nine outings, despite a number of straightforward chances.

Having failed to score in his past seven starts, this is Werner's longest run without a goal since he went nine starts in September 2016 with Stuttgart and Leipzig. He has scored four goals in 14 Premier League matches this season.

The 24-year-old Germany international again misfired on Monday night but his profligacy did not prove costly as Chelsea claimed a 3-0 win over West Ham, with a goal Thiago Silva and a Tammy Abraham double, to move up to fifth in the Premier League table.

"That's the period Timo is in, it's unfortunate but he's getting in the positions - when one [goal] goes in it will be a run for him," Lampard told the BBC.

Although Werner started the season as Chelsea's centre-forward, he has since been played predominantly on the left side of an attacking three, with Lampard switching between England forward Abraham and French veteran Olivier Giroud in the central role.

It was Abraham who got the nod against West Ham and he vindicated his manager's decision with two quick second half goals to secure all three points for the Blues.

"Tammy and Oli (Giroud) both bring different things, Tammy did his thing today and that's what we needed," Lampard said.

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"West Ham are a good team on good form, so many threats, I thought today would be a tough match and it proved to be so, even in the not beautiful moments we defended superbly - Thiago Silva did brilliantly with that.

"We dropped off slightly and it was important tonight we came back. There were loads of things for the team to show their character - we want more."

Chelsea bounced back from two successive league defeats and closed in on the top four as they moved up to fifth in the standings one point behind fourth-placed Everton and six adrift of champions and leaders Liverpool.

West Ham manager David Moyes conceded his team, who stay 10th, were punished for lapses at both ends of the pitch.

"It was a harsh scoreline but we were not good enough in our box, having to defend a couple of times, we weren't good enough in their box when we had the opportunities," he said.

"The players played really well. This was our biggest test so far this season, for the majority of it we played very well but didn't do enough where it matters."