Joe Ledley's first-half goal gave Celtic a 1-0 victory over Inverness at Parkhead and restored their four-point lead over Rangers at the top of the Clydesdale Bank Premier League.
The Wales midfielder converted a James Forrest cross after 16 minutes from close range to extend the Hoops' domestic winning run to 17 games.
Celtic defender Daniel Majstorovic was controversially shown a straight red card by referee Steven McLean on the hour mark before Caley defender Steve Williams was sent off in the 77th minute for picking up a second yellow card for a foul on Georgios Samaras.
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