"One can't understand it," Flick said when criticizing UEFA's decision to choose the venue and allowing up to 20,000 spectators.
Guoan now sits second in Group B with 25 points, with two rounds in the first stage remaining, and has booked a spot in Group C for the championship race.
Having returned to the Merengues on a buy-back clause in 2016, Morata then joined Chelsea before a move to Atletico Madrid in January 2019.
Brighton meanwhile impressed with a 3-0 thrashing of Newcastle United and the game is already looking like a watershed moment for Ole Gunnar Solskjaer, who needs a quick reaction in order to calm jittery Old Trafford nerves.
Brazil's Santos also moved within sight of a berth in the next round with a 2-1 win over 10-man Delfin in the Ecuadorian port city of Manta.
After the restart, Esteghlal were quick to cement their place in the Round of 16 with a third goal, as Karimi supplied a chipped cross from the edge of the penalty area for Cheick Diabate, who guided his header past Al Owais to make it 3-0.
According to Italian media outlets, Vidal has signed a two-year contract with the Nerazzurri including an option for a third year. Enditem
"You deserved a farewell befitting who you are: one of the most important players in the history of the club, achieving great things for the team and on an individual level," commented Messi on social media.
Chinese naturalized player Ai Kesen, known as Elkeson in Brazil, put the Guangzhou side 1-0 ahead in the 14th minute with a penalty kick.
The match went ahead and West Ham defeated their League One rivals 5-1 with assistant Manager Alan Irvine under charge.
Frank de Boer wore the Netherlands shirt 112 times as a player. He started his coaching career at Ajax in December 2010, with which he captured four Dutch league titles. After that he had unsuccessful spells at Internazionale, Crystal Palace and, until July 2020, at Atlanta United. Enditem