Panesar took 1-122 in the first Test against the West Indies
Shane Warne has urged England to keep faith with spin bowler Monty Panesar despite suggesting he has not improved during his international career.
The Australia Test legend was impressed with Panesar when he first hit the international scene in January 2006.
But the 26-year-old has struggled to develop his repertoire and has lost his place to Graeme Swann.
"I'm disappointed with where Monty's at, as he's got the attributes of being a wonderful spin bowler," said Warne.
"I think Swann has done pretty well, he's a handy number eight or nine batter as well, but I think Monty has the ability to take a five-for on the last day and win you the Test."
I haven't seen an improvement in Monty over a period of time, I've just seen him bowl the same
Panesar began his England career well by taking the wicket of Sachin Tendulkar during the tour of India, and had three five-wicket hauls in his first 11 Tests.
But although he has 121 Test wickets to his credit, a dip in form led to Nottinghamshire off-spinner Swann being preferred on the current tour of the West Indies.
"I haven't seen an improvement in Monty over a period of time, I've just seen him bowl the same," said Warne, who took 708 Test wickets in a 145-match career between 1992 and 2007.
He believes Panesar's problem is his inability to adapt his bowling to different conditions, underlined by his failure to claim a wicket in spin-friendly conditions against South Africa at Lord's last summer or in Chennai, when India chased a record last-innings total to win the first Test in December.
"I've noticed that he doesn't adapt to the conditions and bowls the same in all, and you can't do that.
"You need to bowl more over-spin in some conditions, you need to bowl more side-spin in others. There are all different ways to do things in different conditions, but Monty just bowls the same way all the time and hopes that will be good enough."
Warne, meanwhile, believes Andrew Strauss must be more adventurous as a captain if England are to win back the Ashes from Australia this summer.
England failed to win the third Test in the West Indies after Strauss delayed his declaration until his side were more than 500 runs ahead.
"He's got a good head on his shoulders, he knows his own game and he's a good player, but whether he's got the imagination or the flair and the communications skills with all the players I don't know," said Warne.
"No-one comes in as a brilliant captain straightaway, you get better and better.
"I think Andrew Strauss has a chance but you have to give him 12 months to see if he's any good and hopefully he'll grow into it.
"He's got the basics there, he just needs to back his judgement and stamp his own authority and not try to be someone else."