Watson, 37, retired from international cricket in 2016 after a 14-year long career for Australia. He had a poor outing with Royal Challengers Bangalore in the IPL 2017, but returned to his best of forms for Chennai Super Kings in this year's tournament. He scored 555 runs - his highest in a season - which included a century in the final that gave CSK their third title.
"My mind's open," Watson told AAP. "To be able to play in some of these tournaments around the world, it's so much fun. Also, I've experienced life outside of cricket. Cricket is what I know better than everything. While I can really contribute on the field from a skills point of view, as a senior player and I'm still loving it, my mind's open to continue to play.
"But if there comes a point where that real enjoyment is starting to wane and I'm not able to contribute like I know I can, then that'll definitely be the day."
While Watson was contributing with the bat, and occasionally with the ball, he was still far from quick on the field. The physical challenges will only get tougher as Watson will be close to 38 during next year's IPL, for which he has been retained by CSK. He also plays in the Caribbean Premier League, Pakistan Super League and the T20 league in UAE.
"Physically it's always been a challenge anyway, so that hasn't changed," Watson said. "From a mindset point of view, I'm on top of my game more than I ever have. From a technical point of view, I've been able to play Twenty20 cricket for the last three years which means that's the only skill-set I've been working on.
"In theory, cricket is a skill-based game, your skills should only get better the older you get. In theory you should get better until the physical component comes in and your skills start to go down."
Watson's next assignment will be the Big Bash League at home, where he'll play for Sydney Thunder.
First Published: December 14, 2018, 11:16 AM IST