Tiger Woods accepts huge improvement needed to make Open cut

Tiger Woods looks frustrated as he makes his way to the second tee after a double bogey on the 1st (Jane Barlow/PA)

Tiger Woods targeted a second round of 66 to make the halfway cut in the 150th Open after struggling to an opening 78 at St Andrews.

Returning to the scene of two of his three Open victories, Woods carded three birdies, five bogeys and two double bogeys in a round which took six hours and eight minutes to complete.