Rory McIlroy and world's top five feature but no Tiger Woods: PGA Tour returns at Colonial

Ahead of the the first tee shot at the Charles Schwab Challenge, here are some key talking points

World No 1 Rory McIlroy is favourite to win the Charles Schwab Challenge despite it being his first visit to the tournament. AFP

For the first time since March, when The Players Championship was called off after the first round, PGA Tour golf is back from its coronavirus shutdown from Thursday.

The Charles Schwab Challenge at Colonial in Fort Worth, Texas will feature a star-studded line-up and plenty of new health and safety rules to limit the risks of Covid-19.

Ahead of the the first tee shot, here are some key talking points.

Stars on show but no roar from Tiger

Sixteen of the world's top 20 will tee off on Thursday at Colonial Country Club, but Tiger Woods will not be among them.

The 15-time major winner last played on Tour in February at Riviera and missed the next four tournaments, including the Players, with a sore back.

The world No 11 looked to have his game in top shape on May 24 when he and Peyton Manning defeated Phil Mickelson and Tom Brady in a charity match.

He may be saving his fragile body for the frantic revamped schedule in August and September, and so could return as late as Jack Nicklaus's Memorial Tournament on July 16, which Woods has never missed when healthy.

The Memorial could be the first of eight events in 10 weeks for the 44-year-old American.

The WGC Invitational is on July 30-August 2, followed by the US PGA Championship, three FedEx Cup playoff events, and September's US Open and Ryder Cup.

Woods needs one victory to set the all-time wins record having tied Sam Snead's 82 PGA Tour victories at the Zozo Championship in Japan in October.

McIlroy leads stellar cast

World No 1 Rory McIlroy has been installed as favourite this week, despite never having played at Colonial before.

He will be joined in the hunt by the rest of the world's top five – Jon Rahm, Brooks Koepka, Justin Thomas and Dustin Johnson – with Thomas another to play the event for the first time.

But picking a winner is not easy: 101 of the 148 players have PGA Tour wins under their belt, the strongest field in the event's history.

The top three – McIlroy, Rahm and Koepka – will play together for the first two rounds in a stellar featured group that will have an odd feel in front of empty galleries.

No 4 Thomas will play alongside his great pals Jordan Spieth and Rickie Fowler in what could be a fun grouping for an expected large TV audience.

'Beef' doesn't mince words

While the return of the PGA Tour has been universally welcomed, the decision to restart the Official World Golf Rankings (OWGR) has not gone down so well.

Players at the Charles Schwab Challenge and a second-string Korn Ferry Tour event in the US this week will be awarded ranking points.

But the European Tour is not scheduled to return until late July and it will be September before the Asian Tour sees any action.

Players on those circuits, with no points-scoring opportunities, took to social media to vent their anger.

"Completely dumb from @OWGRltd but anyway least golf is starting," fumed England's Andrew "Beef" Johnston on Twitter.

Compatriot Matt Fitzpatrick, the world No 25, chimed in: "Very unfair, can't understand this!"

South Africa's 165th-ranked Brandon Stone tweeted: "Find this very disrespectful to all other tours around the world."

"Agreed! Either all Tours are playing for points or none!" said Austria's No 26 Bernd Wiesberger.

Officials from the OWGR claimed in a statement that the averaging formula used to calculate rankings will help mitigate the problem.

But a row could be brewing, especially if a player on a suspended tour were to drop out of the all-important top 50 and miss out on a major or a lucrative WGC event as a result.