Did Luis Suarez have a little nibble on Man City defender Martín Demichelis' hand during last night's Champions League encounter?
Watch the former Liverpool man, now playing for Barcelona, run alongside Demichelis on the edge of the area in the video above, where he appears to move his mouth in the direction of the Argentine's hand.
The Urguguayan was handed a four month ban from football after biting Italy's Giorgio Chiellini during last summer's World Cup, and has been also caught up in biting controversies during his time at Liverpool and Ajax.
Watch a zoomed in version of last night's incident below.
Luis Suarez will aim to exploit what he considers a vulnerable Man City defence when he returns to England for the first time as a Barcelona player.
The former Liverpool striker, who moved on to the Nou Camp last summer, has not scored so freely in Spanish football as he did in the Premier League.
But he is relishing a crack on Tuesday night at unlocking Champions League rivals City's backline, picking it out as the soft spot in Manuel Pellegrini's team.
He said ahead of the Etihad Stadium last-16 tussle that City have quality "in midfield and up front, but they also have weakness at the back".
I think when you play against the big teams you never know what they're doing on the pitch.
They have really good players and really good quality with the ball but we are Barcelona and we know what we can do against City.
Watch Man City v Barcelona live on ITV on Tuesday from 7.30pm
Luis Suarez admits he has sought professional help in the hope he can cure his impulse to bite.
During the World Cup Giorgio Chiellini was his third on-pitch biting victim, seeing the Uruguayan banned four months.
The Barcelona striker, who is sent to make his club debut on Saturday against Real Madrid, told the Guardian: "I think all the bad things I have been through are in the past. I believe I am on the right path now, dealing with the people who can help me, the right kind of people."
“Everyone has different ways of defending themselves. In my case, the pressure and tension came out in that way. There are other players who react by breaking someone’s leg, or smashing someone’s nose across their face. What happened with Chiellini is seen as worse. I understand why biting is seen so badly.”
Barcelona head coach Luis Enrique says striker Luis Suarez will make his debut for the club against arch rivals Real Madrid on Saturday.
The Uruguayan was banned from playing after biting Giorgio Chiellini in the World Cup, but is now available for his first game following his move from Liverpool in the summer.
"Today I cannot play this game. But he will have some minutes for sure, how many I cannot say," Enrique admitted.
"It is a big thing for him, to join up finally with the team, and get some minutes.”
Luis Suarez was in good spirits as he prepared for his competitive Barcelona debut against Real Madrid in La Liga this weekend.
The striker joked around with Neymar in training ahead of the season's first Clasico.
Luis Suarez has confessed he started crying after sealing a transfer to Barcelona earlier this year.
The Uruguayan was sold by Liverpool in July after receiving a four month ban from any football related activity for biting Italy's Giorgio Chiellini at the World Cup.
The 27 year-old, who is set to make his competitive debut for Barcelona against Real Madrid later this month, told TV3:
I felt I had ruined my career.
At first, I did not want anyone to know anything. I locked myself away with my family, but then I reflected on what I had done, I apologised and felt liberated.
By then discussions with Barca had begun, and when Pere [Guardiola, his agent] called me to tell me it was done, I began to cry, because of the situation I was living and the support that the club was offering me.
I felt happy about the commitment the club had shown me. But I was still afraid that the repercussions of the incident might halt the deal. I knew that could happen.
Barcelona striker Luis Suarez has once again denied he racially abused Patrice Evra.
The Uruguayan, who is currently banned for biting Giorgio Chiellini, told his club's website that the claims were not true.
Suarez was suspended by the FA for eight games and find £40,000 after being found guilty of abusing Evra during a match between Liverpool and Manchester United in October 2011.
"When I say I’m sorry it’s because I regret something. Being sorry implies regret. But they have also sometimes judged me on things that aren’t true, such as the racism thing," Suarez told Barcelona's official site.
"I was accused without evidence and that’s what grieved me the most. The others were actions when it was me who did wrong. I accepted that and begged forgiveness, but the racism thing, when I was accused without evidence, that did upset me."
Luis Suarez's debut for Barcelona is likely to come on Saturday October 25th against fierce rivals Real Madrid at the Bernabeu.
The striker - who switched to the Nou Camp from Liverpool earlier in the summer for £75million - is currently the subject of a worldwide ban after biting Italy's Giorgio Chiellini while playing for Uruguay at the World Cup.
His four-month ban, which started on June 25th, expires on Friday October 24th and today La Liga officials confirmed that Barca's trip to the Spanish capital looks set for the Saturday, with a 1700 kick-off time (British time).
Luis Suarez has pledged that he will not bite again after finally being formally unveiled by new club Barcelona.
The Uruguayan has been banned from football for four months after he bit Italian defender Giorgio Chiellini during the World Cup.
"I say to all the fans: don't worry because I won't do that anymore," the Associated Press quoted the striker as saying.
Asked during a press conference at the Nou Camp what he was doing to ensure no repeats of the incident, Suarez said: "I am speaking to professionals - the right professionals," he added.
Luis Suarez's four-month ban from football for biting an opponent has been upheld by the Court for Arbitration of Sport, but the player has been cleared to train with his new club Barcelona.
The Uruguayan striker received the lengthy ban after he bit Italy's Giorgio Chiellini during a World Cup match in June.
Suarez has since transferred from Liverpool to Barcelona for £75 million, but today's ruling confirms that he will not be able to play for the Spanish side until 26 October.
Their opponents on that day will be their fierce rivals Real Madrid.