Leeds were missing ten first team players but were quickly on the front foot and almost went ahead in the ninth minute when a fine pass from Rasmus Kristensen released Sam Greenwood who sent in a low cross which Joe Gelhardt sent narrowly wide on the stretch. But the Whites were dominating and went ahead in the 13th minute when a Marc Roca corner was met by Robin Koch who headed home a neat finish at the near post. Monaco offered very little but equalised in the 25th minute when a cross from the right flank was headed back across goal and met by Breel Embolo to smash home.
Leeds continued to impress and a brilliant cross field pass from Brenden Aaronson played in Kristensen whose shot back across goal was cleared near the line. After a fine ball from Roca, another Kristensen cross then narrowly evaded Gelhardt who was denied a penalty after tangling with keeper Alexander Nubel. The excellent Koch was replaced by Diego Llorente at the interval and Monaco went ahead just two minutes after the restart when Gelson Batalha Martins tucked home an easy chance after Leeds had been cut open down the left.
Worse was to follow as Monaco then went 3-1 up five minutes later as Ismail Jakobs fired home as Leeds failed to clear a corner at which Luke Ayling was out jumped for a knockdown. Monaco then bagged a fourth just three minutes later as poor control from Kristensen led to Leeds being scythed apart and the visitors worked the ball down the right where Embolo blasted home.
Leeds attempted to rally and Willy Gnonto was by far the brightest spark in the final half hour but three efforts failed to beat keeper Nubel. The Whites looked set to fall to a 4-1 defeat but Gnonto was felled in the area for a penalty in the second minute of stoppage time after Junior Firpo's cross and Joe Gelhardt stepped up to slam home the spot kick.
Leeds United writer Lee Sobot hands out the scores from a real game of two halves at Elland Road.

. Kristoffer Klaesson
5 - Alert in a quiet first half and couldn't do much about the goal but ended up picking the ball out of the net four times despite making a couple of saves and the Leeds defence needed a more commanding presence in the second half. A learning curve. Photo: Ashley Allen

. Rasmus Kristensen
5 - Good in the first half, continually getting forward and sending in some good crosses but sloppy and exposed after the interval. Photo: Ashley Allen

. Luke Ayling
5 - Another shift at centre-back and pretty solid in the first half but it all went wrong after the break and beaten too easily for a header from which Monaco netted their third. Went to right back after Firpo was brought on. Photo: Ashley Allen

. Robin Koch
8 - United's stand out player by a country mile. Extremely composed and assured at centre back but taken off at half time and that made a huge difference. Neatly headed home the Leeds opener. Photo: Ashley Allen

. Pascal Struijk (left)
5 - Steady enough in the first half but then given a torrid time as Monaco netted three times in rapid succession after the break. Moved to centre back after Firpo came on. Photo: Ashley Allen

1. Kristoffer Klaesson
5 - Alert in a quiet first half and couldn't do much about the goal but ended up picking the ball out of the net four times despite making a couple of saves and the Leeds defence needed a more commanding presence in the second half. A learning curve. Photo: Ashley Allen

2. Rasmus Kristensen
5 - Good in the first half, continually getting forward and sending in some good crosses but sloppy and exposed after the interval. Photo: Ashley Allen

3. Luke Ayling
5 - Another shift at centre-back and pretty solid in the first half but it all went wrong after the break and beaten too easily for a header from which Monaco netted their third. Went to right back after Firpo was brought on. Photo: Ashley Allen

4. Robin Koch
8 - United's stand out player by a country mile. Extremely composed and assured at centre back but taken off at half time and that made a huge difference. Neatly headed home the Leeds opener. Photo: Ashley Allen

5. Pascal Struijk (left)
5 - Steady enough in the first half but then given a torrid time as Monaco netted three times in rapid succession after the break. Moved to centre back after Firpo came on. Photo: Ashley Allen

6. Adam Forshaw
6 - Got particularly stuck in during the first half as part of a three-man midfield alongside Sam Greenwood and Marc Roca and made one particularly crunching tackle accompanied with some good passes. Caught out on the odd occasion and less good after the break but one of United's better displays on the night. Photo: Ashley Allen