Barcelona director Guillermo Amor showered Lionel Messi in praise following his treble in Sunday's 5-0 LaLiga demolition of Levante.
The unsavoury scenes before Ajax's win over AEK Athens have led to charges being brought against both clubs by UEFA.
After looking "very complete" in the early part of the season, Real Madrid's subsequent woes have caught Roma official Monchi by surprise.
UEFA intends to roll out VAR in its competitions next season but it could be introduced earlier in the Champions League and Europa League.
Borussia Dortmund came in for adulation from Diego Simeone after a humbling loss for Atletico Madrid in the Champions League.
After watching his side soundly beaten 2-0 by Barcelona in the Champions League, Luciano Spalletti blasted Inter.
Real Madrid won their third straight Champions League thanks to a moment of sublime brilliance from Gareth Bale and Loris Karius' errors.