Wawrinka is the man of the moment having won the Portugal Open last week, and now he's into his first Masters semi-final for quite some time. The Swiss has improved his game a huge amount in the past year and he's become tougher mentally. He's also clearly benefiting from the advice of new coach Magnus Norman who was one of the best clay-courters in the world at his peak.
Wawrinka did well to weather an early storm from Grigor Dimitrov in the third round to send the young Bulgarian packing in three and then made the most of his opportunity with a dramatic 6-2 6-7 6-4 win over seventh seed Jo-Wilfried Tsonga in the quarter-finals. Played out in front of a handful of people, it was an epic encounter, with Tsonga saving three match points in the second set tiebreak before Wawrinka remained impressively firm to take control of the decider.
Berdych will present a different challenge. The Czech bludgeoned his way past Andy Murray yet again on clay in Friday's quarters, taking advantage of the Brit's overly defensive tennis. Wawrinka will have to find a way to avoid being pinned behind the baseline in the rallies by the sheer force of Berdych's flat hitting.
Wawrinka and Berdych are 5-5 on the head-to-head and they contested a very close match indoors in the Davis Cup earlier this year with Berdych edging it in four sets.