Duncan Fletcher has underlined the need for Monty Panesar to develop into an all-round cricketer if he is to establish himself as England's No 1 spinner.
Northamptonshire left-arm spinner Panesar has been given his chance to impress in England's line-up because of the lengthy absence of Warwickshire's Ashley Giles with hip and hernia problems.
Despite being relatively inexperienced for a spinner, Panesar has claimed 17 wickets in his first seven Tests, including a match-winning haul of five for 72 to help England claim an emphatic innings and 120 runs victory over Pakistan in the second npower Test at Old Trafford.
Panesar's impressive start to his Test career has led some to question whether his more attacking brand of slow bowling is the future rather than the containing style which established Giles in the England set-up.
But before Panesar can think about edging ahead of Giles in the pecking order, coach Fletcher is adamant he must first improve the other parts of his game - notably his batting and fielding - to make an all-round contribution for England.
"I think Monty is a very good bowler, but we have to produce 11 players who can produce two of the departments efficiently, whoever is playing for England," stressed Fletcher.
"I still have slight reservations about his batting and his fielding, but he's an outstanding bowler and doing a job for us because there's no one else at the moment who can fulfil that role.
"He needs to work hard at it because if you work hard at your fielding you can really improve that a great deal. It's not easy to turn you into a No 6 batter, but I just think you need to work at those two areas."
Fletcher believes Panesar could do worse than look at the example of Yorkshire seamer Matthew Hoggard, who has worked tirelessly to transform himself into a determined batsman who at the very least is hard to dismiss.
"Monty has improved on his fielding and his batting, but it's not that easy," conceded Fletcher. "If you remember what Hoggard was like, he had to improve his batting and he's really worked at it.
"He's come along from what he was because he was definitely a No 11. He's held up an end and got a few guys through to 100 and that's what you're asking of these individuals."
With Giles' return to international cricket still uncertain - he is yet to bowl following hip and hernia operations - Panesar could go a long way towards establishing himself as his successor if he does improve his batting or fielding.
Until Giles' injury problems, he had become a useful lower order batsman with an aver-age of 20.72 and a decent fielder at gully while Panesar still remains inconsistent in both disciplines.
Asked who is now the No 1 spinner in England's set-up, Fletcher said: "It will depend on when Ashley is going to be ready and how Monty bowls on other wickets and we'll have to make a decision when Giles is ready.
"We'll also have to look at the balance of the side. It was a good wicket for Monty to bowl on and he bowled damn well on it, but we've got to make sure in the future we get wickets that help our bowlers like that.
"Monty bowled very, very well. There was a lot of pressure on him as an individual because the wickets really suited a spinner.
"Quite often when you get onto a wicket like that you can try too hard because you know it all depends on you, but he went out there and bowled a good line and length and spun the ball on occasions a great deal."
Giles admitted: "Monty is the man in possession and I have to get my place back - that's the danger if you do get injured. But my immediate concern is just to get back bowling in any form of cricket. My recovery is going okay, it is just frustrating.
"I cannot bowl and cannot run but the rehab is going well. It is going to be another four or five weeks until we reach that point."
He added: "Monty is a brilliant technician and works extremely hard. His consiste ncy is something that impressed me when he first come into the team."