Martin O'Neill: This season should be a wake-up call for Celtic

The Hoops have won 13 out of the last 14 Scottish Premiership titles, but this season has been chaotic.

WAKE-UP CALL: Martin O'Neill believes the serious trophy challenges Celtic are facing this season should be a "wake-up call" for the club. Pic: Steve Welsh/PA Wire.

Martin O'Neill believes the serious trophy challenges Celtic are facing this season should be a "wake-up call" for the club.

The Hoops have won 13 out of the last 14 William Hill Premiership titles and numerous cups amid a gloriously successful period, but this season has been chaotic.