LEEDS, England, Jan 31 : Premier League leaders Arsenal ended their mini-slump with an emphatic 4-0 victory at Leeds United on Saturday to move seven points clear as champions Liverpool crushed Newcastle United 4-1. Martin Zubimendi's header and an own goal by Leeds keeper Karl Darlow put Arsenal in command before halftime, and Viktor Gyokeres's volley and a clever finish by Gabriel Jesus wrapped things up after the break. Arsenal's first victory in four Premier League games moved Mikel Arteta'