Andy Murray's debut as a coach at the Australian Open left one former tennis star impressed, but not for what he did on-court with Novak Djokovic.

Andy Murray was a late addition to Novak Djokovic's coaching team at the Australian Open, but the two-time Wimbledon champion quickly made his mark on the Serbian

Novak Djokovic and Andy Murray maybe didn't kick off their partnership with a triumph but Nick Kyrgios still thinks that the Briton did "an incredible job" in his coaching debut. On Friday, the Serb's bid for a record 11th Australian Open title came to an end in an unfortunate way after a muscle tear forced him to retire after losing the first set of his semifinal against Alexander Zverev.