The 20-year-old playmaker is training with Villa's Under-21s indefinitely following his latest off-field incident.
Aston Villa youngster Jack Grealish will not be involved in Saturday’s home clash with Watford following a breach of club discipline, manager Remi Garde has revealed at his pre-match press conference.
Grealish, 20, was demoted to Villa’s Under-21s earlier this week after he was pictured in the Daily Mail on two nights out over the weekend.
The playmaker reportedly partied in Manchester just hours after starting Saturday’s 4-0 defeat at Everton, before he was again spotted at a Birmingham venue the following the evening.
The events came after the promising midfielder hit the headlines during last season’s run-in and in the summer following a series of off-field incidents, which prompted former boss Tim Sherwood to warm him about his future conduct.
Speaking ahead of the Watford game, Garde told reporters that Grealish’s actions where “not of the professional standard” and added that he would continue to train with the reserves for the foreseeable future.
"[Grealish's actions] are not of the professional [standard] that I expect from my players”, said the Frenchman. “That's why Jack is training in the U21 team.
“He will not play with us, which is already a big punishment for a player. Now we will see the next step.”
Grealish did not travel back with the Villa squad following the Everton defeat but Garde insisted that he did not have a problem with that, adding: "Sometimes, players in every country ask to stay in the city where we are playing.
"It is not a problem for me; it can happen once or twice during a season. The problem for me was not him not being on the bus.
"English footballers have become more professional but you see young footballers wanting to live life all over, we forget in their brain they are 20."
After bursting onto the Premier League scene late last season, Grealish has endured a frustrating 2015-16 campaign so far, having struggled for form and fitness since picking up a hamstring strain at the start of Villa’s pre-season training camp in Portugal.
The former Republic of Ireland Under-21 international, who switched allegiances to England in September, has made nine starts in 12 total appearances for his hometown club this term, while scoring his first Premier League goal in the 3-2 defeat at Leicester.