Sam Allardyce thought his West Ham United side could have caused Chelsea a headache had they brought their shooting boots along to Stamford Bridge on Sunday.

The Hammers boss was impressed by the quality of delivery supplied from Matt Jarvis on the left flank throughout the derby duel, but frustrated that more was not made of his crosses.

In the end a goal either side of the break from Frank Lampard and Eden Hazard was enough to give an impressive Chelsea side a comfortable 2-0 victory, but Allardyce was left wondering what might have happened had the visitors stuck one of their openings away.

"I'm disappointed we haven't scored," he said. "Chelsea is a very difficult place to come to and you have to maximise the opportunities you get.

"Matt Jarvis' service into the box today was really, really good and unfortunately we didn't have any goals on the end of that.

"We had one struck off, which I thought was a really soft foul. I'm not so sure that if it had been outside the box he'd have given it. Then Andy's had a header a couple of minutes later that went wide. There were two more in the second half, all from Matt Jarvis.

"He was our biggest threat today, every time we got him the ball today he skinned the full back. He put the ball where he should do, in the right areas with the right quality, but again the old Achilles heel for us of not scoring away from home has risen again.

"These kind of chances at Chelsea are difficult to come by, so when you do get them you have to punish the opposition and score them. At the moment we're not doing that."

Lampard's 19th minute opener - his 200th goal for the Blues - was all the home side had to show from their efforts before the break as Demba Ba's wasteful finishing allowed the Hammers to approach the second half with hope they could turn the situation around.

And although Hazard's strike, five minutes after the restart, quashed that to a large extent, Allardyce could not attach any blame to his defenders for not stopping the Belgian from notching the second.

He added: "I will criticise my players if they deserve to be criticised, but you can't stop Eden Hazard, he's that good. When he decides he wants to skip past players, with the ability he's got, he's good at kidding the defenders with what they think he's going to do. He doesn't do that, he throws them off balance and then skips past them again.

"He can finish, he's two-footed, he's quick, he plays really well in tight situations, so I thought it was a really hard job for us to handle him. They were a better side than us, but based on how much they've spent it's no wonder really.

"We tried to hang on, we had some opportunities, but if we don't keep a clean sheet away from home, we don't win - that's our Achilles heel."

West Bromwich Albion