World number two Carlos Alcaraz rolled over his ankle just ten minutes into the first round of the Rio Open.
Jannik Sinner beat Alex de Minaur 7-5 6-4 in the ABN AMRO Open final in Rotterdam to secure his second consecutive tournament victory.
Australian Open champion Jannik Sinner breezed through the opening round of the BN AMRO Open in Rotterdam on Wednesday.
Novak Djokovic and Rafael Nadal will be the star attractions at a new six-man tennis event set to be hosted in Saudi Arabia in October.
Veteran Andy Murray played down hanging up his tennis shoes for good despite suffering his third opening-round loss in a row this week.
Darren Cahill, coach of Jannik Sinner, has backed the young Italian to lead a revolution in tennis alongside the likes of Carlos Alcaraz.