As previously reported by Island Echo, an altercation is said to have occurred in the vicinity of Regent Street at around 18:15 on Wednesday 4th November. The incident is then believed to have continued on to Arthurs Hill and then Avenue Road.
The victim suffered a number of injuries and was taken to hospital.
An appeal for information was issued by Hampshire Constabulary on Monday.
Now, an unnamed man has been arrested on suspicion of causing grievous bodily harm with intent.
He has been released from custody but remains under investigation.
Enquiries into the incident continue.