By Jamie Spencer Arsenal manager Mikel Arteta has welcomed new Liverpool boss Arne Slot to the Premier League, but hinted at the challenge that lays ahead of the Dutchman filling the “unprecedented” shoes of Anfield predecessor Jurgen Klopp. Earning the job off the back of his record with Feyenoord, Slot was the man chosen to replace Klopp following Liverpool’s most concentrated period of success since the 1980s. “I don’t know [if Slot will change anything],” Arteta told ESPN. “That’s a question for him and the people that have decided to come here. Welcome to the Premier League. I think he is…