LEEDS, England, Jan 31 : Such is the depth of Arsenal’s squad that even when Bukayo Saka suffered a hip niggle in the warm-up before kickoff at Leeds United on Saturday, manager Mikel Arteta could simply insert another England international winger in his place. Noni Madueke, who moved across London from Chelsea in a deal worth around 50 million pounds  ($68.4 million) last summer, has been largely a back-up option for Premier League leaders Arsenal but when Saka was ruled out at Elland Road, he responded in style. He was instrumental in laying the foundations for a 4-0 win that got Arsenal back on track after their recent wobble, setting up the 27th-minute opener for Martin Zubimendi and sending in a wickedly curling corner that Leeds keeper Karl Darlow could only fumble into his own goal after 38 minutes. His cross for the opener was his first assist of the season and although he was denied being credited for Arsenal’s second, it was a display that would have provided comfort for Arteta. “(Saka) wasn’t comfortable …