Wayne Rooney can extend his career by moving into midfield, his former manager David Moyes believes.
Moyes, who gave Rooney his first-team debut at Everton, also managed him at Manchester United in the 2013-14 season.
The Scot used Rooney in attack, while his successor Louis van Gaal selected him in midfield for much of last season before making him United's first-choice striker this year.
Rooney, 29, equalled Sir Bobby Charlton's England scoring record by striking for the 49th time in his country's colours against San Marino on Saturday, and will break it if he finds the net against Switzerland at Wembley on Tuesday.
Moyes believes Rooney's immediate future should lie as a centre-forward -- but thinks he could drop into a deeper role in the next couple of seasons.
"I think that while he is probably England's best striker at the moment he has to continue playing as a striker and scoring goals," he told BBC Radio 5 Live.
"But I could genuinely see Wayne being a midfield player for a year or two after that -- I think he has got that ability when his legs run out a bit.
"He is such a good footballer and passer of the ball that he could play in other positions and it could be that he steps back [positionally] in time."
Rooney, with 233 United goals since joining from Everton in 2004, is also closing in on Charlton's United record of 249.
Although he does not turn 30 until October, he has already played 668 senior games for club and country.
Moyes thinks the key to longevity may be taking on a new role, adding: "He has played top football for 12 or 13 years, and not many players have had careers as long as that and played as many games.
"Wayne has got many miles on the clock, but I do think he can go on a bit longer."