The semifinals are set at the ATP Rotterdam Open and it promises to be an entertaining day of tennis in the Netherlands’ second city. As always, we here at LWOT will be offering our predictions for every match on the slate, as well as the action at WTA Doha, ATP Dallas, and ATP Buenos Aires. But who will book their place in Sunday’s final?

ATP Rotterdam Semifinal Predictions 
Alex de Minaur vs Ugo Humbert

Head-to-head: de Minaur 5-2 Humbert 

This one should be tight from the start. Alex de Minaur has been consistent whilst not at his very best so far this week, grinding out tough wins – not leat in his comeback against Botic van de Zandschulp in the quarterfinals. Crucially, the Australian has shown he can handle pressure on indoor courts where his speed and defense shine. He also got good pedigree at the ATP Rotterdam Open, having made back-to-back finals in 2024 and 2025.

Ugo Humbert, meanwhie, convincingly beat Christopher O’Connell, with the Frenchman looking sharp and confident with his big serve and aggressive baseline play. Both players are in good rhythm, but de Minaur’s ability to stay steady in longer rallies and turn defense into offense gives him a small edge in what could be a close contest. Expect the Australian to advance.

Prediction: de Minaur in 2

Felix Auger-Aliassime vs Alexander Bublik

Head-to-bead: Auger-Aliassime 4-2 Bublik

Felix Auger-Aliassime is on a roll right now, extending his indoor winning streak with a solid win over Tallon Griekspoor in the quarterfinals. The Canadian has always performed well on fast indoor hard courts—his big serve and forehand click nicely here, and he’s looked composed under pressure lately. Alexander Bublik brings unpredictability with his serve variety and touch, and he’s capable of big upsets when things go his way.

He’s had some strong moments this tournament too. That said, Auger-Aliassime’s current form and comfort on this exact surface make him tougher to break down over three sets. Expect some fireworks, but the Canadian’s consistency should carry him through.

Prediction: Auger-Aliassime in 3

Main photo credit: Geoff Burke-Imagn Images