By Fraser Watson Darts phenom Luke Littler has been dubbed ‘Kebab Boy’ by Michael van Gerwen. The pair haven’t seen eye-to-eye since Littler’s ascent into the centre of the darts universe, and there has been tension and a growing rivalry between the pair. Both fell short in the Premier League darts on Thursday night in Rotterdam, with Littler succumbing 6-3 to Michael Smith and ‘MVG’ letting down his home crowd by losing 6-4 to Luke Humphries. Now the pair are set to face off in Liverpool next week, with only four events remaining before the top four compete at the O2 Arena on May 23. Littler …