'Pompey, for me, is the finest club in the world and this is just the beginning,' Gaydamak said.
'The achievement of Pompey over the last few weeks has been fantastic and I am relieved we have not been relegated. I am delighted at the way everyone at the club has shown commitment and spirit to achieve our objective, which seemed to fade away up to the last minute of the Manchester City game.
'I would like to extend my hearty appreciation to all the staff working behind the scenes who have remained focused throughout, and whose effort and dedication should never be underestimated.'
Gaydamak was also keen to pay a 'special tribute' to Mandaric. 'One cannot fail to notice the respect and adulation shown by so many people to Milan for his contribution and dedication to Pompey through thick and thin.'
He added: 'I would like to thank Harry, a football legend and pro, for a job well done, and the players, who have proven to be all about heart, spirit, unity, skill and excellence and have shown their true blue colours when the going got tough.'
The Fratton Park faithful were also applauded. 'Pompey supporters turn every game into a home game and are respected up and down the country for their fantastic support,' Gaydamak said.