Justin Thomas admits his confidence is high after he claimed his fifth victory of the season at the Dell Technologies Championship on Monday.

The American, who celebrated winning his maiden major title at last month’s US PGA Championship, carded a final score of 66 at TPC Boston to finish on 17-under par for the tournament, three strokes clear of nearest rival Jordan Spieth.

The victory has propelled the 24-year-old up to a career-high number four in the latest world rankings while he is also second in the FedExCup standings, with just two tournaments left to play.

Thomas feels he has now proven he is capable of winning at the highest level on a regular basis. “I feel confident when I get in these situations like today, or like I did at the PGA, I feel like I can get it done,” Thomas said.

“I feel like I’ve proven that I can get it done.”

Spieth is the only player ahead of Thomas in the FedExCup standings although he has had to settle for a second-place finish in both playoff events so far this year, something he is hoping to change over the next few weeks.

“It’s just a matter of closing it out,” Spieth said.

The FedEx Cup Playoffs are set to continue next week with the BMW Championship before the season is rounded off by the Tour Championship at the end of the month.