Mutua Madrid Open - Wednesday Matches to Watch

Most of the top players in the world hit the blue clay on Wednesday.

Here's what to keep an eye on:

Men

Nikolay Davydenko vs. Rafael Nadal - Rafael Nadal makes his debut on the blue clay.

Roger Federer vs. Milos Raonic

John Isner vs. Marin Cilic - A lot is now expected of Isner on clay.

Ryan Harrison vs. Jo-Wilfried Tsonga - Harrison is due for a big win.

Women

Agnieszka Radwanska vs. Sara Errani - Errani has won 3 clay court events in 2012.  She's legit.

Victoria Azarenka vs. Ana Ivanovic

Angelique Kerber vs. Na Li

Sam Stosur vs. Petra Cetkovska

Mutua Madrid Open - Monday Matches to Watch

The women are through the first round and the men are ramping up play on Monday as everyone gets a taste of the blue clay in Madrid.

Here are the matches to keep an eye on:

Women:

Elena Vesnina vs. Serena Williams - Serena gets her first taste the blue clay.

Jelena Jankovic vs. Carla Suarez Navarro

Chanelle Scheepers vs. Sara Errani

Angelique Kerber vs. Venus Williams - Should be very close.  Would be a huge win for Venus.

Samantha Stosur vs. Christina McHale

Men:

Viktor Troicki vs. Donald Young - Can Young win more than just a few games?

Sergiy Stakhovsky vs. Ryan Harrison

Igor Andreev vs. Juan Carlos Ferrero