By Kieran King Michael van Gerwen has warned Luke Littler that he is coming back to BEAT him, after losing against the 16-year-old sensation in the Bahrain Masters final on Friday. Van Gerwen battled past Hasan Haji, Rob Cross, Michael Smith en route to the final, while Littler beat Man Lok Leung, Nathan Aspinall and Gerwyn Price. But it was the teenager who came out on top during a topsy-turvy final as Littler romped to a 8-5 victory to secure his first World Series title. ‘Mighty Mike’ showed glimpses of his top form, but fell short against Littler, who averaged 97.85 throughout the tourname…