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Tsitsipas, who has not appeared in a showpiece match since winning the Dubai Tennis Championships in February 2025, outlasted Shevchenko for a 6-4 3-6 6-3 victory.

The former world No.3 only dropped one point on serve in the opening set, with none of those coming in his first four service games, although he then endured a wobble in the second.

Shevchenko converted his third break point in game four, then held firm on his own serve to tee up a decider, though Tsitsipas soon rediscovered his form.

The Greek got the all-important break seven games into the third set, later converting his first match point with a downward smash at the net.

"It was a great fight against Aleksandr. I think we played an incredible match from both sides," he said after the win.

"It's unfortunate there had to be a winner at the end. I thought both of us deserved the victory."

Tsitsipas will face Belgium's Raphael Collignon in the final, after he saved match point en route to a 1-6 7-6 (7-5) 7-5 win over Juan Manuel Cerundolo.

Collignon has never previously appeared in a Tour-level final, but Tsitsipas expects a difficult match when they face off for the trophy in Switzerland.

"We've both had long matches. We both really want it," Tsitsipas said. "We've come to the end, the two of us, so I feel like no one wants to go out there and not give it their all. It's one last breath. I want to get out there and take the court by storm."