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CHICAGO (Reuters) - Minnesota Vikings quarterback Brett Favre, who had ankle surgery last week, remains cagey on whether he will play a 20th season in the National Football League following what he felt was his best year yet.

"Physically, I don't feel great. I'm not getting any younger," the 40-year-old future Hall of Fame quarterback told a Minneapolis motivational seminar via satellite on Wednesday, the St. Paul Pioneer Press reported on its website (www.twincities.com).

Favre, the league's all-time leading passer, has said in the past that if he did return he would require surgery on the ankle he injured during the NFC Championship game in January.

But the three-times league MVP, who underwent arthroscopic surgery on his ailing left ankle last week, has since held off from making any commitment to the upcoming season.

Favre, who has flirted with retirement for the last few years, said 2009 was "the best season I've ever had."

He had one of his greatest statistical seasons last year when he threw for 4,202 yards, 33 touchdowns and just seven interceptions in 16 regular season games.

(Writing by Gene Cherry in Raleigh, North Carolina; Editing by Frank Pingue)