Zverev keeps his bid for #1 alive with an escape against Sinner.
— Ben Rothenberg (@BenRothenberg) April 15, 2022
If my math is right: if Zverev wins the Monte Carlo M1000, and then wins the Munich 250, he would be the new ATP #1 before Madrid so long as Djokovic doesn't reach the semifinals or better at the Belgrade 250.