Aussie champ Jannik Sinner won't defend Rotterdam title

(Photo credit: Mike Frey-Imagn Images)
After winning his second Australian Open over the weekend, World No. 1 Jannik Sinner of Italy has opted for rest rather than defend his title at Rotterdam next week.

"After consulting with my team we had to take the difficult decision to withdraw from the ABN AMRO Open," Sinner said in a statement Monday.

"My body needs time to rest after the long run in Australia. I have great mem