All semi-finalists confirmed in Tokyo

All four semi-finalists have now been confirmed at the ATP 500 tournament in Tokyo.

Carlos Alcaraz booked his place in the last four after his quarter-final opponent Denis Shapovalov was forced to retire due to injury. The Spaniard had already won the opening set 7-6 in a tie-break when the Canadian decided he could not continue.

Another Spaniard, Jaume Munar, also progressed to the semi-finals after comfortably defeating France's Kyrian Jacquet 6-4, 6-2.

Valentin Vacherot of Monaco advanced after a hard-fought victory over France's Arthur Fils. The match ended 7-5, 4-6, 6-4 in Vacherot's favour.

The final semi-finalist is Jiří Lehečka. The Czech player produced a dominant performance to beat Adolfo Vallejo 6-1, 6-1.

The semi-finals will feature an all-Spanish clash between top seed Carlos Alcaraz and Jaume Munar.

The other semi-final will see Valentin Vacherot face Jiří Lehečka.