Can Khan compete at 147?

[Leighton]

I havent seen much of Khan and its hard to tell on paper ,can someone tell me; who has given him the hardest fight so far?

You could say either Maidana or Peterson. He beat Maidana on points reasonably easily but was close to getting knocked down a couple of times. In my opinion Peterson gave him the hardest fight. He pushed Khan all the way through and never got an easy round.