Former world champion Michael Smith fears Luke Littler will want to ‘smash me up’ in retaliation to his defeat on Thursday evening. Littler continued his brilliant start to life on the PDC senior tour on his Premier League Darts debut to defeat world No 1 Luke Humphries in a repeat of the World Championship final. Smith was up next for Littler in the semi-final with the pair putting on a belter in front of the boisterous crowd in Cardiff. Littler had a match dart at double 15 to make the final, but agonisingly missed by millimetres. Smith made the teenager pay for his miss on his next visit to…