United let slip a two-goal advantage to end Ten Hag's winning run in the final game of their pre-season tour of Asia and Australia.
Manchester City said it was opening an investigation and would issue an indefinite stadium ban to the fan responsible.
Pep Guardiola’s defense of the trophy was secured on the final day in a more jittery way than expected when City briefly had a 14-point lead in January.
Philippe Coutinho has impressed since arriving at Aston Villa on loan in January after struggling to make an impact at Barcelona.
Aston Villa boss Steven Gerrard said that Philippe Coutinho would go up a level after signing a four-year deal to join the Premier League club from Barcelona.
A come-from-behind 2-1 win at Aston Villa, sealed by a 65th-minute header by Sadio Mane, showed Liverpool's heart for the fight and moved Jürgen Klopp's team level on points with Manchester City.
A look at what’s happening in European football on February 13
Aston Villa signed defender Calum Chambers from Arsenal, making him the club's fifth addition of the January transfer window.
Reece James' own goal put Villa ahead, but Jorginho quickly levelled from the penalty spot in a clash between two of the many English sides hit by cases of coronavirus.
The remaining four Premier League matches due to be played this weekend are currently scheduled to proceed as planned.
Xavi Hernández is set to make his coaching debut at his boyhood club FC Barcelona when it hosts Espanyol in a derby at Camp Nou.
Smith replaces Daniel Farke and makes a quick return to the league, following his departure from Aston Villa eight days ago.
Villa moved quickly to appoint Gerrard after firing Dean Smith on Sunday, with the club having lost five straight games in the league to drop to 16th place in the 20-team top flight.
Moyes’ team began with confidence and opened the scoring in the seventh, when Declan Rice passed out to the right for Ben Johnson.
The victory lifts David Moyes' Hammers to 20 points after 10 games -- level on points with third-placed Manchester City.
Arsenal was completely dominant for most of the game and built a 3-0 lead before Jacob Ramsey pulled a late goal back for Villa, which then pressured for the last 10 minutes without coming closer.
Lewis Grabban's first-half header was good enough to give the Birmingham club victory at Villa Park as Leeds suffered their 10th defeat of 2018.