Carlos Alcaraz got his maiden ATP Finals campaign back on track with a win over Andrey Rublev in which the Russian hit himself so hard with his racquet he drew blood.

It was a second defeat for Rublev, who lost to Daniil Medvedev on Monday, and means he cannot reach the semi-finals.

Zverev faces Medvedev later in the day.

World number two Alcaraz got the key breakthrough in a tight opening set in the 11th game and then served out the set.

Fifth seed Rublev had tried to regroup but started showing his frustration when he went break point down in the first game of the second set, smashing his racquet on the court.

When he lost the next point he then took his emotions out on his left leg, whacking himself with the racquet repeatedly on his way to his chair, leaving himself bleeding from above his knee.

He continued to struggle with his emotions and went another break down, with a dominant Alcaraz winning the final 12 points.