"AS Monaco has decided to refund the Red and White supporters in the visitors' tribune tonight," the club said in a statement.
The visiting side and defending champions conceded four goals in the opening 27 minutes.
SV Eindhoven have won the Dutch Eredivisie league title for the 24th time after beating Ajax 3-0 on Sunday.
PSV came into the game with a seven-point lead over their second-placed visitors but made that 10 with just three games to play after a comfortable win.
Goals from Gaston Pereiro, Luuk de Jong and Steven Bergwijn made it a champagne afternoon for Phillip Cocus men.
To complete a miserable day for Ajax, they finished with nine men after late red cards for Nicolas Tagliafico and Siem de Jong and have now gone four seasons without lifting the title.
Feyenoord consolidated fourth position with a 3-1 win over fifth-placed FC Utrecht. Nicolai Jorgensen and Robin van Persie scored either side of Cyriel Dessers leveller to give the hosts a 2-1 half-time lead, with Sam Larssons effort after the break sealing a fifth successive win.
An outstanding goal from Socceroos playmaker Tom Rogic has helped Celtic brush aside bitter rivals Rangers 4-0 and book a place in the Scottish Cup final.
Rogic swept the Hoops into the lead in the 22nd minute when he collected the ball just inside the area and twisted past two defenders, then fired past goalkeeper Wes Foderingham.
Fellow midfielder Callum McGregor made it 2-0 with a drive in the 38th minute of a startlingly one-sided encounter.
Five minutes after the break Gers defender Ross McCrorie was given a straight red card by referee Bobby Madden for denying Moussa Dembele an obvious goalscoring opportunity. From the resultant penalty the French striker scored ''Panenka'' style for his seventh goal in nine Old Firm games.
The Ibrox side rallied in desperation but midfielder Olivier Ntcham scored a fourth from the spot in the 78th minute with Graeme Murtys side fortunate to finish with no further damage.
AC Milan goalkeeper Gianluigi Donnarumma foiled title challengers Napoli with a stunning stoppage-time save in a 0-0 draw on Sunday as Juventus took full advantage by beating Sampdoria 3-0 to go six points clear at the top of Serie A.
Substitute Douglas Costa set up all three goals as Juve put their bitter Champions League exit at the hands of Real Madrid behind them and took a big step towards a seventh successive title.
AS Roma, fresh from their remarkable comeback win against Barcelona in the Champions League, hit the woodwork twice in a 0-0 draw with neighbours Lazio, still smarting from their Europa League exit at the hands of Salzburg.
Lazio had Stefan Radu sent off in a fiery match which left the two sides level on points in third place.
Real Madrid midfielder Isco made up for the absence of Cristiano Ronaldo by guiding his heavily rotated side to a 2-1 win at basement club Malaga on Sunday which lifted them above Valencia and up to third in La Liga.
Also on Sunday, Atletico Madrid moved back to within 11 points of runaway leaders Barcelona by comfortably beating Levante 3-0 at home as forwards Angel Correa, Antoine Griezmann and Fernando Torres were all on target.
Isco curled in a fizzing free kick to break the deadlock in the 29th minute but refrained from celebrating against his hometown club. The Spain international then provided the final pass of an exquisite team move for Casemiro to tap in the second in the 64th.
Malaga striker Diego Rolan scored down the other end in the final minute of stoppage time after controlling the ball with his hand but there was no time left for the leagues lowest-ranked club to try and add to their goal.
Schalke 04 beat local rivals Borussia Dortmund 2-0 to stay on course for a second-place Bundesliga finish and a return to the Champions League.
The Royal Blues had the upper hand in the first half but could not make their advantage count against the lethargic visitors.
Five minutes after the restart, however, Yevhen Konoplyanka was left unmarked in the box and drilled in to give Schalke the lead following a defensive mistake from Marcel Schmelzer.
Brazilian Naldo made sure of the points for Domenico Tedescos team with a free-kick missile from 25 metres out in the 82nd minute.
To make matters worse for Dortmund, their forward Michy Batshuayi had to be taken off on a stretcher with an injury in stoppage time. The 24-year-old Belgian is on loan from Chelsea until the end of the season.
Schalke are second on 55 points with Dortmund dropping to fourth on 51, behind third-placed Bayer Leverkusen on goal difference, after they beat Eintracht Frankfurt 4-1 on Saturday. Already-champions Bayern Munich crushed Borussia Moenchengladbach 5-1 on Saturday.
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