India, May 5 -- Most tennis players - even some of the very best ones - have days where they struggle and don't feel the ball the way that they want to.

For top-ranked Jannik Sinner, those types of days are getting rarer and rarer.

And with Carlos Alcaraz sidelined due to a right wrist injury, it doesn't seem like anyone can beat the top-ranked Sinner as the heart of the tennis season approaches with the French Open and Wimbledon coming up over the next two months.

"He's very stable. He doesn't have dips. He doesn't have phases where he goes down," No. 3 Alexander Zverev said after getting routed by Sinner in Sunday's Madrid Open final for his ninth straight loss to the Italian. "That's why he's world number 1."

Sinner's title in the ...