KP unconcerned by Harmison form

The Durham fast bowler struggled in the first innings, when he claimed just one wicket, but as West Indies begin the final day on seven without loss needing a further 394 for an unlikely victory, Hampshire batsman Pietersen believes Harmison could be the key to their hopes of bowling them out.

"We're not concerned with Steve at all," claimed Pietersen, who hit a superb 109 off 138 balls to help England declare 400 ahead on 284 for eight. "We just know he's going to click. He's bowled so well for Durham at the start of the season, he's been brilliant and I don't know whether it was the slope or what it is here at Lord's, but when he gets it right he's a handful."

Harmison continued to struggle on Sunday night with his only over, bowling wides with his first two deliveries before switching to round the wicket and finished the day having hit Chris Gayle in the box area, for which he needed several minutes of treatment.

Pietersen stressed: "We saw when he came round the wicket last night and bowled four pretty decent balls - if he does that for two or three hours then who knows? The sky is the limit for that bloke - he could be the best bowler in the world."

Left-arm spinner Monty Panesar continued to enhance his reputation on Sunday by finishing with a career-best six for 129 to help dismiss West Indies for 437 and earn England a 116-run first-innings lead.

With England still expected to be without seamer Matthew Hoggard, who is struggling with a thigh strain, Panesar is again expected to play a big role when both sides push for victory.

"Monty just comes in and does his job," enthused Pietersen. "He gets everyone going and excited and he's just a good bloke to play around. "He could be the key on the fifth day, but then again we've got a lot of firepower in (Liam) Plunkett and Harmison, which we haven't seen properly yet this Test. If they get going and Monty does a good job then who knows?"

But far from being dispirited by their massive target on the final day, the tourists believe it is one they could reach and claim a shock victory at Lord's.

"We'll be looking and assessing as the day goes on and if the time's right and there's an opportunity for a win, we'll certainly be pushing for one," said coach David Moore.