Thierry Henry believes Arsenal can win the Champions League as well as becoming domestic champions this season.
Henry left the north London club this summer in a £16.1million switch to Barcelona after eight highly-successful years which saw him become the Gunners' all-time top scorer.
The 30-year-old never won a European trophy with the club although he was part of the side that reached the 2006 Champions League final before losing 2-1 to Barca.
This year, the Gunners have made a flying start to their European campaign and top Group H after victories over Sevilla and Steaua Bucharest.
They also lead the Barclays Premier League having dropped just two points all season to confound critics who predicted a tough season following Henry's departure.
Now the Frenchman has predicted double success for Arsene Wenger's young team, saying: 'I have been watching Arsenal and see that they are playing entertaining football and winning every game home and away.
'I know the young players there very well and they can definitely win the Premier League and Champions League this season. I watched how they beat Sevilla in the Champions League and I think they sent out a big message to the rest of Europe. Sevilla is not an easy team to play, but Arsenal played a great game.'
The Gunners experienced a period of unrest in the summer with the shock exit of former vice-chairman David Dein and Henry's departure followed by uncertainty over Wenger's future until the manager agreed a new contract at the Emirates.
Henry revealed he has maintained his relationship with his fellow Frenchman, with whom he started his career at Monaco more than 10 years ago.
'Me and Arsene have been in contact a few times since I left. I always talk to him because even with the difference of age, the bond and respect is there,' Henry said.
'It is tremendous that he has signed a new contract. He has great eyes and just has a talent for spotting young talent. He is a great human being as well and that's what makes the difference. He makes players feel comfortable and always gets the best out of them.'