straight to your inbox every day for freeDenis Irwin described Luke Shaw as "the best left-back in the league" following his resurgence at Manchester United.The English defender has been one of the Premier League's most-improved players this season, with Shaw shining since Alex Telles' arrival from Porto in the summer.Shaw's quality in the final third in particular has impressed, with the left-back's numbers highlighting the vast improvement in his attacking output.As a result, Irwin believes