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The PGA Tour is rolling right along, and this week it's highlighted by the 2021 Zurich Classic in Louisiana as we get a brief reprieve from the normal 72-hole stroke-play events. The 160 golfers represent the biggest field of the year, but that's broken into 80 two-man teams contending for this tournament in its current iteration for the fourth time.

There are some terrific teams to follow throughout the week, too. Jon Rahm and Ryan Palmer are the most recent champions, and they will play together again. Masters contenders (and Presidents Cup teammates) Marc Leishman and Cameron Smith are among the favorites. So are Collin Morikawa and Matthew Wolff, as well as another Presidents Cup duo in Xander Schauffele and Patrick Cantlay.

Three rounds are in the books, and as we get set to entire the final round of action on Sunday at TPC Louisiana, we have a tight leaderboard that should make for an exciting finish. Louis Oosthuizen and Charl Schwartzel emerged at the top on Saturday after combining to shoot a 63 to put them at 19 under. However, the contenders are not far behind as the teams of Marc Leishman and Cameron Smith and Tony Finau and Cameron Champ sit at 18 under. 

Here's how you can follow throughout the week.

All times Eastern; streaming start times approximated

Round 4 -- Sunday

Round starts: 10 a.m. 

Featured groups and holes: 10:30 a.m. - 6 p.m. -- PGA Tour Live
Early TV coverage: 1-3 p.m. on Golf Channel

Live TV coverage: 3-6 p.m. on CBS
Live simulcast: 3-6 p.m. on CBSSports.com and the CBS Sports App

Radio: 1-6 p.m. on PGA Tour Radio