Will they not sustain it? Unlike the other sides in Europe, Spurs can easily rotate their team for the Europa League and still have enough overall to go through to the knockout stages and if they are still at the top or near the top come January or February, you get the feeling that Mourinho will prioritize the league. And unless Son and/or Kane get/gets injured, they will likely be up there. Including today, this is their immediate 7 league games:
Man City (h)
Chelsea (a)
Arsenal (h)
Crystal Palace (a)
Liverpool (a)
Leicester (h)
Wolves (a)
If they pick up at least 13 points from their next 6 games, then...NIGHTMARE ON THE CARDS!