It has been 25 innings since Cook scored a century and his captaincy has also come under scanner as England's winless run extended to nine matches following the draw against India in the first Test at Trent Bridge.
But ahead of the second Test of the five-match series against India starting Thursday at Lord's, Robson seemed confidence about his opening partner's return among runs.
"He's (Cook) a world-class player, he's one of England's best-ever players there's no doubt about that, we're all aware of that," Robson was quoted as saying by Sky Sports today.
"There is no doubt that runs are not far away for him. It's a tough game and it's easy to get out and a few things haven't gone his way in the last couple of Tests from what I can see at the other end.