How much would the $NZ3.7 million Australian Open winner's purse mean to Rafa Nadal? It could buy him three more wristwatches for his collection.

As the resurgent Spaniard won his way into the tournament semi-finals with a win over Canadian Milos Raonic, Nadal was apparently keeping time with a $1.2 million Richard Mille design.

Mile has sponsored Nadal since 2010 and the 14-time Grand Slam champion has worn several exclusive designs over the years.

This RM 27-02 is the latest, and obviously presents no encumberance to serving aces and smashing winners. Yes, we know he's left-handed and wears the watch on his right wrist, but there is the whole balance thing to consider.

Advertisement

In 2012, Nadal reportedly had a $476,000 Mille watch stolen while on loan from the designer.

Other sports stars wearing these watches include Formula One drivers Felipe Massa, Jenson Button and Fernando Alonso, 2012 US Masters golf champion Bubba Watson and Jamaican sprinter Yohan Blake.

In show biz, Rocky and Rambo star Sylvester Stallone, martial arts funny guy Jackie Chan and singer Pharrell Williams also boast the Mille designs.