PONTE VEDRA BEACH, Fla. — What did Jason Day do after winning the Wells Fargo Championship on Sunday, his second victory of the year?

He brought in his coach, Col Swatton, to work with him in advance of Thursday’s Players Championship opening round at TPC Sawgrass.

Day wasn’t kidding about getting his hands dirty in pursuit of regaining the No. 1 world ranking, which could belong to any of five players come Sunday afternoon — though not Day.

“I usually don’t bring Col into tournaments only because I typically like to work with him before events, but I’ve had a three-week stretch here, and I can kind of feel the swing’s getting a little bit loose,’’ Day said Wednesday. “So we just tried to even out the path a little bit, kind of trying to get it back to zero and trying to get the ball starting straighter, because I typically like hitting it dead straight. I’d like to say I hit it dead straight all the time, but I don’t.

“It’s still not quite there. I mean, I’m still aiming a little bit right, but I’m just trying to move it back to the left where I’m aiming straight now, so I don’t have to feel like I have to drop it on the inside and hit this big old draw. The correction is I just need to hit the back of the ball with a square clubface. Pretty easy, right?”

There are a lot of players who were in last week’s field who wish they were having the same “loose’’ swing issues Day felt he was having.

Rory McIlroy is one of those players. He’s had a hate-love relationship with TPC Sawgrass, missing the cut in the first three of his eight tries.

“I didn’t like it that much, [but] I like it a lot [now],’’ McIlroy said. “It’s funny, like I started staying on the beach a few years ago, and that’s made the event a lot more enjoyable. I stayed pretty much on property at a hotel [on site] and I just felt like I couldn’t get away from it. It’s busy and there’s a lot of people. So to go and stay on the beach now, it’s a nice sort of release from everything that’s going on around the event. So I actually put a lot of it down to that.

“This is my ninth time here, so I’m not a spring chicken anymore. I’ve got a few years under my belt, and it took me a few years to figure it out, but I’ve had a few top-10s here and I haven’t been quite right in contention but I’ve been close enough. I think it’s about time I step up and give myself a chance on Sunday.”

It’s possible that, by Sunday, there might be a new No. 1-ranked player in the world depending on what current No. 1 Dustin Johnson does.

All four players ranked right behind Johnson, who’s been ranked No. 1 for the last 15 months, have a chance to take over the top spot. Justin Thomas, Jon Rahm, Jordan Spieth and Justin Rose all have a mathematical chance this week to replace Johnson atop the world ranking.

“Am I one of them?” Spieth, ranked No. 4, asked. “Sweet.”

For Thomas, who tied for third two years ago when he finished with a 65, this will be his fourth try at trying to reach No. 1. He needed only 12th place alone last week at Quail Hollow to make it, but he tied for 21st.

Depending on what the players behind him do, it looks like Johnson might need to finish in the top 10 to avoid losing the ranking he first reached by winning at Riviera in February 2017. Johnson has never finished better than 12th at the Players.

“I don’t want to lose it,” Johnson said of No. 1. “So if I want to keep it, I have to play well.”