Tim Duncan started his NBA career at San Antonio Spurs and having spent 17 years with the four time NBA Champions Duncan may decide to opt out at the end of the season, according to ESPN.
The 38-year-old is currently playing for Spurs in their NBA Finals match-up against Miami Heat, and after gaining a 4-1 lead over the reigning champions Gregg Popovich's men have clinched their fifth NBA title.
"I don't know when I'm going to retire," Duncan said.
"I don't know any of that and I don't care about any of that stuff right now. It will happen when it happens."
The four-time NBA Champion has had a great career at Spurs, and will undoubtedly be happy after clinching his fifth NBA title, having had such an influence on reaching the finals this season.
Meanwhile there is speculation that head coach Gregg Popovich will leave after these finals with the main incentive of winning this years' Championship and ending their careers on a high, but having both been put on the spot about their futures they chose to not answer the question.
This years' NBA Finals have been a redeeming factor for San Antonio, as considering last year they lost to Miami Heat 4-3 after a draining season they have turned it round and shocked Erik Spoelstra's men.
Duncan was key in their game one victory at the AT&T Centre scoring 21 points in Spurs' 110-95 win, as well as their 98-96 defeat to Miami in game two, scoring 18 points.
At the age of 38, Duncan has featured in every game of these play-offs, averaging 32.7 and 16.4 points a game.
Duncan's best point averages came in the Western Conference finals against the Oklahoma City Thunder where the power forward averaged 17.8 points a game.
In the previous season when San Antonio just missed out on the championship Duncan had a better points scoring average in the play-offs, having played less games and recording an average of 18.1 points in 35 minutes of play in 21 games.
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