By Tom Gott Barcelona manager Xavi has urged fans not to compare teenage starlet Lamine Yamal to Lionel Messi after the 16-year-old’s latest heroics against Mallorca. With Barcelona struggling on Friday evening, Yamal stepped up with a sensational strike that secured all three points for the Catalan giants. “It doesn’t benefit anyone to be compared to Messi,” Xavi stressed post-match. “It’s true that there are moments. He’s a left-footer who cuts inside and puts it in your corner. It gives the impression that he has flashes of Messi, but it’s best not to compare him. “Comparisons do not benefi…