Cook and Lyth struggling: Lehmann

Darren Lehmann has called on Australia's bowlers to take full advantage of the pressure they've created on England's opening duo Alastair Cook and Adam Lyth.

The left-handed pair have produced just one score above fifty from a combined 12 innings so far in this Ashes series, with Cook's defiant innings of 96 in England's heavy loss at Lord's the exception.

The form of Test rookie Lyth will be of particular concern for the home side given he's averaging just 12 for the series heading into the pivotal fourth Test at Trent Bridge, starting on Thursday.

Cook is averaging 30 for the series but his form is far less of a worry given his brilliant start to the year; the skipper has seven scores of fifty or more in 2015 and is averaging more than 50 from seven Tests.

England have all the momentum following their crushing win at Edgbaston and Lehmann says his highly-rated pace attack will need to replicate their stunning performance from the second Test to help Australia set up a series decider at The Oval. 

"We've got some pressure on their batters with Lyth and Cook struggling so now we've got to continue that on and get the ball in the right areas a bit more often," Lehmann told 5AA.

"(Starc) didn't bowl as he would have liked in this one (at Edgbaston) but bowled better in the second innings. He bowled a ripper to get Cook and he started to get it right.

Watch: Starc produces a beauty to remove Cook

"We didn't bowl very well after getting bowled out for 136. We should have bowled them out for around 200.

"We bowled beautifully with (the Dukes ball) at Lord's and not so good in the other two. So hopefully it's our turn to bowl well with it again and get it right.

"We certainly didn't bowl as well as we would have liked in good conditions the other day and the bowlers understand that."

While Lehmann didn't elaborate of any potential changes to Australia's XI, Shaun Marsh is considered a strong chance to come into a middle order that the coach pointed out contributed 50 runs from a combined eight innings at Edgbaston.

Marsh has registered centuries in both of Australia's practice matches on this tour and posted a patient 69 in his most recent Test, against the West Indies in Kingston in June.

The 32-year-old has played 13 Tests since his debut four years ago and on Sunday received high praise from batting coach Michael Di Venuto, who said the left-hander had "clicked as a batter" and was starting to show signs of fulfilling his enormous potential.

Quick Single: Di Venuto says Marsh is ready to go

Lehmann echoed Di Venuto's sentiments ahead of meeting with selector on duty Rod Marsh later this week to discuss any potential changes to Australia's XI.

"You don't like to change too much. This side beat England by 400 runs (at Lord's)," Lehmann said.

"(Marsh) is knocking the door down hard, isn't he? He was very good in the West Indies for us when he came in for Rogers. He got 70-odd in one of the Test matches.

"He's starting to work it out, as you normally do, when you get to that sort of age ... in your prime and starting to really understand your game well.

"He's knocking the door down and we'll have to work out whether we can fit him in or if we can't."

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