Karlovic , the 23rd seed , beat Jo - Wilfried Tsonga , winning three sets via tie - breaks , to set up the clash with Murray .
Karlovic , the 23rd seed , has never defeated the Scot in five meetings .
Karlovic , the 23rd seed , beat Jo - Wilfried Tsonga , winning three sets via tie - breaks , to set up the clash with Murray , but has never defeated the Scot in five meetings .