Tiger Woods (left) and Phil Mickelson played a surprise practice round together ahead of the Masters.

Tiger Woods (left) and Phil Mickelson played a surprise practice round together ahead of the Masters.

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Phil Mickelson 'challenges' Tiger Woods to golfing duel

It's the dream pairing golf fans yearn for, but Phil Mickelson has upped the ante and called out Tiger Woods for a separate high-stakes shootout. The veteran duo will play together, alongside another marquee player Rickie Fowler, in the first two rounds of the Players Championship at Sawgrass, Florida, this week, and 47-year-old Mickelson was in playful mood as he threw out the challenge to his old rival.