Two-time Wimbledon Champion Carlos Alcaraz says Alexander Zverev has well and truly joined the battle to be the world’s number one tennis player.

An injury lay-off for Alcaraz has seen Jannik Sinner take the top spot in the rankings, while Zverev has risen to second with his victories at the French Open and US Open.

Alcaraz – who’ll team up with Zverev for Team Europe at the Laver Cup this week – says the German is in impressive form.