25 January 2014 Last updated at 09:18 GMT

Australian Open: Rafael Nadal praised by Pete Sampras

Fourteen-time Grand Slam winner Pete Sampras says he has "never seen anything like" Rafael Nadal after watching the Spaniard play live for the first time in his Australian Open semi-final win over Roger Federer.

Sampras says Nadal "does everything" and will be "looking beyond" his own record, which Nadal would reach with victory in Sunday's final.

Sampras fears Swiss opponent Stanislas Wawrinka does not have the "firepower" to stop Nadal becoming the first male player in the Open era to win each Grand Slam twice.