Arsenal striker Eduardo has been ruled out of Sunday's clash at Chelsea.

The Croatia international has failed to recover from the hamstring injury he sustained in the goalless draw with Aston Villa last week.

Midfielder Abou Diaby could return from the calf problem that has kept him sidelined since mid January as the Gunners attempt to nudge their title challenge back on track.

"Diaby is not yet back in normal training," Gunners boss Arsene Wenger told ArsenalTV Online.

"He progresses very well but we will still have to wait until Saturday. He is a maybe. Eduardo is already ruled out.

"Theo Walcott is back and available so Diaby is the only question mark we have. All the others are longer term injuries."