The fixture will conjure happy memories for the Sky Blues, who shocked Spurs to win the FA Cup in the 1987 final, and manager Mark Robins will be hoping to spring another surprise when he takes his League One team to White Hart Lane on Saturday.
But Tottenham's Iceland international has previous knowledge of giant killings in the tournament as he helped Reading, which was then in the Championship, to overcome Liverpool and West Brom on the way to the quarterfinals in 2010.
“It’s a great occasion for them,” Sigurdsson told Spurs’ official website. “They come up against a top Premier League side and they will come here, want to do a job and take the chance to impress everyone.
“We have to make sure we’re ready for that and we’re in the draw for the next round.”
The 23-year-old made a rare start for Andre Villas-Boas’ men in the New Year's Day 3-1 victory over his former side with the win moving the north Londoners into third place in the table.
“Reading scored the goal early and that made it difficult for us," he added. “We had lots of shots from outside the box as it was quite difficult to get into positions up against the goalkeeper.
“But sometimes you have to be patient and we know we’ll eventually get those chances, especially playing at home, with the players we’ve got here. We had to keep going, keep believing and we got there in the end. The win was well deserved.”