Manchester United flop saw his second game for new club go from dream to nightmare.

Antony, 24, during the . The Brazilian built on in his first game for the outfit by just 10 minutes into Saturday's trip to .

Team-mate Diego Llorente doubled Betis' lead soon after, putting side on course for only their second victory in their six games acrss all competitions. But a second-half collapse saw Celta turn the game around and win 3-2, as Williot Swedberg netted the decisive goal in the 87th minute.

Antony, having picked up a yellow card, was subbed off in the 72nd minute, returning to the pitch for the full-time handshakes with a face like thunder. During a post-match interview with , the United's £86million signing made his feelings clear.

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"It's very difficult to understand that we lost this match. We started very well, we went 2-0 up but we have to change our mentality," Antony fumed. "We scored two goals, but we have to be focused throughout the match, the 90 minutes. We have to work to be better.

"We have to change our mentality. We have to start well and finish well. We have to work hard, look at what we are not doing well in order to get the three points in the next game."

Pellegrini echoes his winger's message, saying: "It was a good first half in which we took the lead. Two goals are a good advantage, but it was not decided. Unconsciously we took refuge in the scoreboard, they took the initiative and scored two goals that tied the game. Then we had a frustrating second half in terms of football.

"The second half was not good defensively. Celta is an offensive team, that plays well and looks for the opposing goal. We lost control of the ball and we took refuge in the 0-2."

Will Antony return to Manchester United and be a success? Give us your prediction in the .

Pellegrini will take solace in Antony's impressive start to live in Seville, with Betis agreeing to pay 84 per cent of the former star's £200,000-a-week wages. The boss said after Antony's debut: "Well, I think it was a very positive debut. He's a quality player.

"I was talking to him just before the game. I think a good player doesn't have to be constantly showing off his skills with the ball. He has to play a good game, make few mistakes and do two or three important things: a goal, a good pass, a good cross.

"I think he was very involved today, especially with the second goal. He had just arrived a couple of days before and I think he's going to contribute a lot to us."

Betis's next match will be away to Belgian side in the Conference League play-off round.

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