Detectives from Ealing CID l aunched an appeal to trace 28-year-old Rafael De Jesus in connection with the attack in Portland Road, Southall on Saturday (March 26).
Rafael was arrested in connection with the investigation on Thursday (March 31) and he remains in custody at a west London police station.
On Saturday, a man in his 20s was rushed to hospital after being found stabbed at around 4am and has since been reported to be in a serious but stable condition.
Police enquiries into this investigation continue.
Police are also seeking a man with a QPR tattoo in connection with a stabbing in Ealing on Good Friday (March 25).
Meanwhile police in Hounslow are urgently seeking a man suspected of harassment and witness intimidation.