Manchester United do not need to spend big this summer to stay on top, according to striker Wayne Rooney
United have been frugal in comparison with some of their rivals but Rooney feels the Premier League Champions have the players to challenge for honours.
"I don't believe we need many changes," he said. "We have won the league for the last three seasons and reached the Champions League final twice in a row.
"I think the manager has probably got it right."
Spanish giants Real Madrid have twice broken the world transfer record this summer, firstly with the signing of Brazilian Kaka from Milan for a reported £56m and then in capturing world footballer of the year Cristiano Ronaldo from United for £80m.
They have also signed Karim Benzema - who in the process rejected a move to United - from Lyon for an initial £30m and last week completed a £30m deal to bring Xabi Alonso to the Bernabeu from Liverpool.
Mega-rich Manchester City have been similarly busy in the transfer market, spending close to £100m on the likes of Kolo Toure, Roque Santa Cruz, Gareth Barry, Emmanuel Adebayor and former Old Trafford striker Carlos Tevez.
In contrast United have been relatively quiet, despite Ronaldo's profitable exit, bringing in just three players: Antonio Valencia from Wigan for £16m, Gabriel Obertan from Bordeaux for £3m and Michael Owen on a free transfer.
Rooney though is not concerned about the comparative lack of signings.
"There is no element of jealousy at the money City and Real Madrid have been spending," he added. "If our manager felt he needed to spend he would."
Whilst United's spending power was enhanced by Ronaldo's departure, the side will clearly be affected by the loss of a player who has contributed an average goal tally in excess of 30 a year for the last three seasons.
However, Rooney is confident that the dilemma posed by the sale of the Portugal international will be solved.
"Cristiano is the best player in the world," said Rooney. "If you lose him of course there are going to be questions asked.
"But we have brought Michael Owen and Antonio Valencia in and they have settled in fairly quickly so it is on us to build on that.
"We might need to play a little bit of a different style to try and keep winning games and trying to win trophies but I am confident we will manage it."
Rooney believes Bulgarian striker Dimitar Berbatov, who came in for some heavy criticism last season for his performances, will shoulder some of the attacking burden.
"You can see in training and games during pre-season Dimitar has looked sharper," Rooney stated. "He looks like he is more determined.
"He is tracking back with the full-backs in pre-season and is definitely working harder and trying to impress.
"He is a brilliant player. He has so much quality he has got and we all want him to show it."
Equally, Rooney is ready to embrace the goal-scoring responsibility, assisted by being granted the more central striking role he has filled so well for England in recent games.
"The manager has said I will play a more central role and I have said quite often that it is my preferred position," he added.
"I am not sure whether it will happen. Whatever the manager says goes. But I was delighted to play there against Chelsea (in the Community Shield) and I hope to stay there for most of the season.
"Put it this way, if I keep scoring goals from this position it will justify why I have been selected there and then I don't see any reason why he would play me out wide."