|Derbyshire 59, Lascelles 94||Venue: The City Ground
MILLWALL were knocked out of the Capital One Cup by Jamaal Lascelles's extra-time header at the City Ground.
After a goalless first half, the Lions fell behind when Matt Derbyshire nodded in after a quickly-taken short corner but Andy Keogh touched in Liam Feeney's shot to equalise at the death and take the tie into extra time.
But Lascelles climbed highest in the area to convert another set piece as Forest booked a third-round clash against Burnley.
Steve Lomas made six changes to the side that started against Sheffield Wednesday on Saturday, with Jack Smith, Paul Robinson, Scott Malone, Feeney, Martyn Woolford and Jimmy Abdou all starting.
Forest began the game on the front foot, dictating the tempo of the game in the opening ten minutes albeit without creating any clear-cut chances.
Millwall slowly worked their way into proceedings and had their first shot on goal in the 15th minute when Lee Martin fed Woolford, who drilled tamely at Dorus de Vries.
Scott McDonald forced de Vries into a far more testing save shortly afterwards when he spun away from his marker and sent a curling effort towards the top corner, which the goalkeeper did superbly to claw away.
Opportunities for both sides were few and far between, but the home side were having particular difficulty getting their shots away. On the half-hour mark Djamal Abdoun's teasing cross was headed over by Jamaal Lascelles.
Stephen Bywater had largely been a spectator up until the 35th minute when Simon Gillett's shot took a wicked deflection, but thankfully for the Lions 'keeper the ball trickled harmlessly wide.
The home fans thought their side had been awarded a penalty shortly before half time when Guy Moussi went down under Abdou's challenge, but referee Mark Heywood booked the midfielder for diving.
McDonald had a golden opportunity to break the deadlock within seven minutes of the restart, but he curled agonisingly wide after being put through on goal by Woolford's precise pass.
And that missed proved costly when Derbyshire headed Forest in front shortly afterwards. Substitute Ishmael Miller should have put the game to bed in the 70th minute but Bywater made a superb block.
Millwall kept plugging away and were rewarded for their persistence four minutes from time when John Marquis' close-range effort was parried by de Vries into the path of Feeney, whose shot was glanced home by Keogh.
That equaliser sent the tie into extra time, but Forest quickly regained the lead when a corner was headed back across goal and Lascelles turned the ball in from inside the six yard box.
Robinson nearly produced an instant leveller when he latched onto Chaplow's corner, but the centre-back headed just wide. In the 101st minute, Woolford's half-volley drew an acrobatic save from de Vries.
With the end of extra time fast approaching, Keogh turned his man inside the area and rolled a delicate shot a matter of inches wide as Forest held on to progress to the next round.