... is because the QPR player allegedly threw the first punch.
Barton, 29, was released on bail later that day pending further inquiries.
Three other men were also bailed following the incident, which took place outside Garlands nightclub.
On Tuesday Barton tweeted: ‘Looking forward to Portugal now tomo. Bit of rest and lots of golf...’
‘I got sucker punched in the back of the head.
‘Not injured as reported just a small bruise on rear of head/ear.
‘I’ve had worse. Life goes on! Thanks for the concern. Have a good day people.
‘Not planning on pressing charges as it’s not that serious. The police have also got better things to do with their time.
‘Can I just say a public thanks to the police last night as they were and have been today brilliant.’
A picture of the incident – seemingly showing a shirtless Barton being held back by police and a tearful woman – began to circulate on Twitter on Tuesday.
Regardless what Barton says ... a guy who claimed to have been at the scene, said Barton ‘looked in a bad way’ after the fight, with a blooded nose and cut mouth.