The north London side hope to avoid a repeat of the outcome when the two sides met in the 1987 final and will use his previous cup experience to help Spurs through the round
The fixture will conjure happy memories for the Sky Blues, who shocked Spurs in the 1987 final and Mark Robins will be hoping to spring another surprise on their hosts 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, who were then in the Championship, to overcome Liverpool and West Brom on the way to the quarter-finals 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 and supplied the assist for Michael Dawson that helped contribute to the north Londoners rise to third 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.”