Tottenham boss Mauricio Pochettino was pleased with their 4-1 FA Cup win at Colchester.
"The job's done, we're in the next round," Pochettino said.
"When you create a lot of chances and it's impossible to score in the first 15 minutes - we created five, six, seven clear chances - you always invite the opponent to believe.
"But I think we were always in control. Maybe we conceded some chances, but I feel very pleased because of the result."
Pochettino was "very pleased" for Chadli, but believes the Belgian should have had a hat-trick after hitting the crossbar.
"Sometimes you need to keep some goals for the next games," Pochettino said.
Spurs, who play at Norwich on Tuesday, are also in the latter stages of the Europa League and fourth in the Premier League.
Asked if a treble was a realistic target, Pochettino said: "We have quality enough and a strong squad to try to fight for every competition. Then we'll see."