Unlike the Ryder Cup where the captains submit the entire lineup each day, the Presidents Cup matches are determined one at a time.
After Nicklaus deferred on the first pick, International captain Gary Player put Australians Geoff Ogilvy and Adam Scott on the board and Nicklaus countered with Steve Stricker and Hunter Mahan. Nicklaus then went with Mickelson and Austin, and Player matched them up with Weir and Singh.
In the third match, Masters champion Zach Johnson and Stewart Cink drew South Africans Trevor Immelman and Rory Sabbatini.
Player ended up putting together a left-hander matchup between Mickelson and Weir, but was really thinking about Weir's record against Mickelson in Presidents Cup play and the International team's desire to put the Canadian in an early match.
"Never even thought of it. Never even came across my mind,'' Player said. "The little golf ball doesn't know whether you're a lefty or a righty.''
Weir faced Mickelson five times in the 2000 and 2003 events, winning four matches, including a 4-and-3 singles victory in 2000.
"I've had some great success against Phil,'' Weir said. "In 2000 in singles, I just played great, shot 6 or 7 under. ... Obviously, whoever plays the best will win, but I think Vijay and I will be a good team.''