The Championship play-off semi-final between Luton and Huddersfield is finely poised after the first leg ended in a draw at Kenilworth Road.
Danel Sinani put Huddersfield ahead before Sonny Bradley equalised.
Both sides had appeals for a penalty turned down in an exciting encounter.
They will meet again in Monday's second leg, with the winner facing Nottingham Forest or Sheffield United at Wembley on Sunday, 29 May for a place in the Premier League.
Huddersfield should arguably have been awarded a spot-kick in the opening 10 seconds when Harry Toffolo was barged over by James Bree while trying to get to Ollie Turton's cross.
The visitors then had to absorb a spell of pressure - but went ahead on the counter-attack after Luton were caught out by Toffolo's ball forward.
Sinani, on loan from Norwich, capitalised by taking on Bradley and firing past keeper Matt Ingram at his near post.
Skipper Bradley hauled Luton level on the half-hour mark by nudging home Kal Naismith's left-wing free-kick.
And Luton then had a penalty appeal of their own waved away by referee Robert Jones when Cameron Jerome burst through on goal and went down after tangling with Naby Sarr.
Huddersfield dominated possession as the Hatters tired in the second half, but both struggled to create clear-cut chances.
More to follow.
Line-ups
Luton
Formation 3-1-4-2
27Ingram
16Burke5Bradley4Naismith
23Lansbury
2Bree22Campbell18Clark29Bell
35Jerome7Cornick
27Ingram16BurkeSubstituted forHyltonat 80'minutes5Bradley4NaismithBooked at 57mins23LansburySubstituted forLockyerat 67'minutes2Bree22Campbell18Clark29Bell35JeromeSubstituted forSnodgrassat 89'minutes7CornickSubstitutes
3Potts9Hylton12Snodgrass14Mendes Gomes15Lockyer20Kioso21IstedHuddersfield
Formation 3-4-3
21Nicholls
32Lees6Hogg23Sarr
20Turton37Russell8O'Brien3Toffolo
24Sinani25Ward19Holmes
21Nicholls32Lees6Hogg23Sarr20TurtonSubstituted forÁvilaat 45'minutes37Russell8O'Brien3Toffolo24SinaniSubstituted forThomasat 85'minutes25WardSubstituted forRhodesat 71'minutesBooked at 90mins19HolmesSubstitutes
2Ávila7Anjorin9Rhodes16Thomas18Blackman26Colwill48EitingReferee:Robert JonesAttendance:10,005Live Text
Match ends, Luton Town 1, Huddersfield Town 1.
Second Half ends, Luton Town 1, Huddersfield Town 1.
Foul by Jordan Rhodes (Huddersfield Town).
Tom Lockyer (Luton Town) wins a free kick in the defensive half.
Jordan Rhodes (Huddersfield Town) wins a free kick in the defensive half.
Foul by Kal Naismith (Luton Town).
Jordan Rhodes (Huddersfield Town) is shown the yellow card for a bad foul.
Foul by Jordan Rhodes (Huddersfield Town).
James Bree (Luton Town) wins a free kick in the defensive half.
Substitution, Luton Town. Robert Snodgrass replaces Cameron Jerome.
Corner, Huddersfield Town. Conceded by Jordan Clark.
Corner, Huddersfield Town. Conceded by Sonny Bradley.
Attempt blocked. Pipa (Huddersfield Town) right footed shot from outside the box is blocked. Assisted by Duane Holmes.
Corner, Luton Town. Conceded by Naby Sarr.
Attempt missed. Tom Lockyer (Luton Town) header from the centre of the box is too high. Assisted by Kal Naismith with a cross.
Substitution, Huddersfield Town. Sorba Thomas replaces Danel Sinani.
Attempt missed. Jordan Clark (Luton Town) right footed shot from outside the box is too high. Assisted by Amari'i Bell.
Substitution, Luton Town. Danny Hylton replaces Reece Burke because of an injury.
Attempt missed. Tom Lees (Huddersfield Town) header from the centre of the box misses to the right. Assisted by Danel Sinani with a cross following a corner.
Corner, Huddersfield Town. Conceded by Reece Burke.