How strong is your clay-court knowledge?

The clay-court season is officially underway, and you know what that means: Rafael Nadal. The King of Clay will look to defend titles in Monte Carlo, Barcelona, Madrid and Roland Garros. Get back into the swing of clay with this quick quiz:

This week on Tennis Channel Plus:

—ATP Houston Outer Courts (4/9-4/13)

Catch all the action from the U.S. Men's Clay Court Championship with outer court coverage live on Tennis Channel Plus beginning Monday April 9 at 4 p.m. ET

—ATP Marrakech Final (4/15)

Don’t miss the Grand Prix Hassan II final live on Tennis Channel Plus Sunday April 15 at 9 a.m. ET

—ATP Monte-Carlo (4/15-4/22)

Watch first to last ball of the Rolex Monte-Carlo Masters live on Tennis Channel Plus beginning Sunday April 15 at 7 a.m. ET