The Spaniard finished 11th in the first qualifying session at Monza Friday, clearly struggling aboard the Ducati Alstare 1199 R.Last week, Alstare Ducati reports that Checa received treatment for osseous edema to humerus of the left shoulder, or fluid in the tissues that causes inflammation and pain.Throughout Friday’s World SBK’s sessions, which were led by BMW Motorrad GoldBet’s Marco Melandri, Checa reported the pain got worse. He consulted with the Clinica Mobile doctors, and along with his team decided not to compete this weekend.Instead, Checa will recuperate for the next few weeks in hopes of returning for Donington World Superbike in two weeks.The 2013 WSBK began sour for the 40-year-old rider. Checa earned the pole for Phillip Island SBK, the season opener, but crashed out in race one. Due to a concussion, he was forced to miss race two.At round two in Aragon, Checa couldn’t keep the pace, finishing 7-8. This also occurred at Assen two weeks ago, where Checa finished 10-10.For a preview of Monza World Superbike, click here.