DAYTON, Ohio -- Tonight on ECW, Mr. McMahon announced John Cena is no longer WWE Champion, and the title is now vacant. Cena underwent surgery for a complete tear of his right pectoral tendon today, and he'll be out of action for six months to one year. (WATCH: the Chairman's the shocking announcement)

With the WWE Championship now vacant, Mr. McMahon said the situation will be rectified at No Mercy. There will be a WWE Championship match this Sunday. History will be made Sunday when a new WWE Champion will be crowned at No Mercy, live on pay-per-view.

Stay with WWE.com for further updates on Cena's condition and on No Mercy as they become available.

WATCH: Video of Cena's match on Raw

PHOTOS: Cena's injury