Two of the world's three best tennis players are facing off in the championship match of the Madrid Open on May 3. These two are Jannik Sinner, who is currently the world's No. 1-ranked player, and Alexander Zverev, who is currently the world's No. 3-ranked player. While Sinner has won the past three tournaments he has participated in and has defeated Zverev eight straight times, Zverev still has a better shot than just about anything else to dethrone the Italian icon. Jannik Sinner of Italy is congratulated by Alexander Zverev | Mike Frey-Imagn Images Despite them being world-class competitors, it's clear that Sinner and Zverev have a mutual respect and appear to be friendly when they're not facing off against each other. Their respective girlfriends definitely don't have any hostility. This was shown by an exchange that Zverev's girlfriend, Sophia Thomalla (whom he has been dating since 2020), and Sinner's girlfriend Laila Hasanovic (whom he has been dating for about a year) had on social media last month.…