A couple of really good semifinal matches are on tap tomorrow on the European grass.

Notes: Rafa pulls out to rest the knees after his Roland Garros run…Tough starts for (3) Haas after a bye vs. Gulbis or Baghdatis, (5) Raonic vs. Monfils, and (4) Nishikori after a bye vs. Youzhny…Janko Tipsarevic also pulled…Former champs in the field are Haas (2012,’09), Kohlschreiber (2011), and Federer (2008,’08,’06-03).

Rafael Nadal and Novak Djokovic head for a semifinal collision at the French Open while Roger Federer continues to struggle.

Tommy Haas enjoyed watching his opponent Mikhail Youzhny today smash his racquet to smithereens.

Tommy Haas held it together to outlast John Isner in a thriller at the French Open.

Federer, who next meets the No. 15 seed Simon who has been tested in long matches, was also on the energy-conserving tip.

American qualifier Jack Sock was a straight-set winner over Spaniard Guillermo “G-Lo” Garcia-Lopez, and will next meet Haas.

The long-running Davis Cup-style ATP World Team Cup is no more, this year replaced by a 250-level tournament at The Rochusclub in Düsseldorf…Tough starts for (8) Davydenko vs. Tursunov, and 2nd rd. (2) Haas vs. Dodig…Wildcards went to Benjamin Becker, Haas and Juan Monaco…Pulls from the event included Nicolas Almagro, Grigor Dimitrov, Florian Mayer, Philipp Petzschner and Mikhail Youzhny.

“I was complaining a little bit that these things weren’t working, so I think I just needed some positive words from Martina out there,” Pavlyuchenkova said. “She told me to keep playing my game and be more aggressive, and other things. It really helped.”

Veterans Tommy Haas and David Ferrer bid for titles Sunday.