I think Whittaker has some serious question marks around him, maybe it was ring rust but he looked seriously outclassed against Izzy. Whittaker was always prone to taking shots and Izzy exposed his technique a little. His chin held up against Romero but i just don't know if you can maintain that damage. I think Tills size is a problem for himI'd like to see Till vs. Whittaker but I can see why they wouldn't want to risk Till after that performance.
I think Whittaker would KO him.