(Reuters) - American Sofia Kenin has proved she is no flash in the pan following her maiden Grand Slam triumph at last year's Australian Open but the prospect of defending that title has got the world number four's nerves jangling.
Kenin, 22, defeated world number one Ash Barty in front of her home crowd in the semi-finals en route to the title at Melbourne Park and then won in Lyon to climb to her career-best ranking of fourth.
