Sigurdsson admits Tottenham face must-win against Arsenal
Spurs have slipped to seventh in the table after a poor run of results.
Sigurdsson said: "We went to Old Trafford in September and got the three points and, apart from a couple of off days, we have been doing well.
"We were on a good run, but after Wigan we want to put that right, win games and try to stay up there with the top teams.
"We have got a couple of really important games coming up and if we pick up the points in those games we can be right up there around Christmas time."