Barcelona sporting director Andoni Zubizaretta has refuted claims that the Catalans have already struck a deal with Santos for striker Neymar.
It was rumoured that in the Blaugrana's annual report, the youngster was listed as a recepient of a hefty £8 million (€10m) bonus ahead of a even more lucrative agreement in the future.
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"It has been frustrating for me at times this season, I'm not going to lie – like on Tuesday night in the Champions League [against Shakhtar Donetsk], the rotating," Cahill told Sunday Mirror Sport.
"I think you can accept it if you are playing the same amount of games as everybody else. That's the only way you can come to terms with it.
"When I first came into the club, it was a bit of a whirlwind with all sorts going on. Trying to find my feet was a bit strange. It's unsettling for a start and then to come into the club that was unsettled at the time, it was double madness.
"But, 100 per cent, Chelsea is now a different club from the one I joined. It took a couple of months, but everything has settled down now and I knew that would happen."
In Terry's absence the Englishman will be playing alongside Brazilian Luiz, with whom he believes he has struck up a good partnership.
"It seems to have gone well," he added. "But it's gone well whatever pairings have been put out. I've done well with JT or David. I enjoy playing with both."
Cahill made his debut in a thrilling 3-3 encounter against Manchester United last season, with Chelsea throwing away a three-goal lead during a chaotic period for the London club.
"My debut against United was a crazy game. At 3-0, I thought it was going to be a dream debut. It was all going to plan and then suddenly, as you come to expect from Manchester United, it all turned around."
And Cahill believes he can prevent Wayne Rooney from firing United to victory on Sunday afternoon as he know the forward's strengths from playing with him for England.
"It helps that I know a lot of Wayne's strengths," he continued. "But like all players of that calibre, he can do the unexpected."