Golf legends Tiger Woods and Phil Mickelson are gearing up for a rematch of their 2018 head-to-head, this time in aid of charity.
The pair will face each other in Florida on Sunday along with NFL stars Tom Brady and Peyton Manning in another step towards the return of live sport.
Mickelson beat Woods in a $A13 million showdown in November 2018 in a one-off round designed for pay-per-view television, although it struggled to capture the imagination of the golfing world and technical issues meant it was ultimately available to watch for free.
This time the players and Warner Media have together put up $US10 million ($A15 million) for Covid-19 relief efforts.
Woods and Mickelson had a frosty relationship earlier in their careers but it has thawed considerably in recent times and the mind games for this event have been played strictly for laughs.
Mickelson showed off his 'The Match' trophy during a live video call between the four competitors and Woods responded by putting on his green jacket from his 2019 Masters triumph.
The NFL players - both quarterbacks - also have a long-standing rivalry to spice up proceedings.
Brady, Mickelson's partner, recently joined the Tampa Bay Buccaneers after winning six Super Bowls during two decades with the New England Patriots.
The retired Manning won two Super Bowls during a career which saw him turn out for the Indianapolis Colts and Denver Broncos.
The contest will take place behind closed doors at the Medallist Golf Club in Hobe Sound, one of Woods' regular practice courses, with no caddies but players allowed to drive their own golf carts.
The format will be fourball for the front nine followed by a foursome on the way back with the amateurs - both of whom have single-figure handicaps - given some shots on the way out.