Another Davis Cup semifinals berth for Serbia - on the back of a record-extending Novak Djokovic win

The world tennis number one's 21st consecutive singles win in the competition - a straight sets triumph over Cam Norrie - has helped the Serbians to a 2-nil quarterfinal victory over Great Britain.

Djokovic outlines what he feels his behind the unbeaten run - which stretches all the way back to 2011.



Serbia will play Italy in one semifinal - Australia taking on Finland in the other.