World number two Rafael Nadal starts with win at Barcelona Open . Reigning champion enjoys 30th straight victory in the tournament . ` The second set was not as good as the first , but I kept my energy and speed . Former world number one Roger Federer wins his first title of the year against Juan Martin Del Potro. German Mona Barthel watched Ivanovic win French Open whilst at school .
World number two Rafael Nadal starts with win at Barcelona Open . Reigning champion enjoys 30th straight victory in the tournament . Former world number one Roger Federer wins his first title of the year against Juan Martin Del Potro. German Mona Barthel watched Ivanovic win French Open whilst at school .