Luka Modric felt we should have wrapped up the win against Leeds long before Jermaine Beckford's last-gasp leveller in Saturday's FA Cup tie at the Lane.
We dominated the early stages and Leeds had goalkeeper Casper Ankergren to thank for keeping them in the tie.
However, we took the lead just before half-time through Peter Crouch and following Beckford's first equaliser, led again when Roman Pavlyuchenko finished off a fine move for 2-1 in the 75th minute.
Leeds kept going though and found a second equaliser in the fifth minute of added time when Michael Dawson was judged to have fouled Beckford and the striker slotted home from the spot.
We now go to Elland Road for the replay on Wednesday, February 3 with the winners travelling to Bolton in the fifth round on February 13/14.
"We're all disappointed," said Luka. "We had the game in our hands but Leeds managed to score in the last minute.
"We all knew that Leeds are a good team and it was going to be tough, they beat Manchester United at Old Trafford, after all, but we deserved the win.
"We didn't take our chances and in the end we conceded a bit of an unlucky goal. I'm not sure if it was a penalty or not, but it was given and we need to quickly move on because we have another big game against Fulham on Tuesday."
Luka said he was delighted to see Roman get on the scoresheet - he was first on the scene to congratulate him. "Yes, I was pleased for him. Pav's a great player and a great lad and it was an excellent goal. It was a good moment for him."