Over the past few years Tottenham Hotspur have managed to upset a string of clubs with their transfers.
With finances set to be tight in the coming years as Spurs face the reality of having to balance the books with a new stadium to pay for, the club needs to be making friends not enemies.
You never know where or when you might need help with a deal or loan on a player especially if, as highlighted by the previous transfer window, the club's budget and transfer targets are going to be seriously restricted for the foreseeable future.
General Levy rubbing up clubs the wrong way
Chairman Daniel Levy polarises opinion even among his own fans.
Once recognised as one of the shrewdest chairmen in football, Levy is fast earning a different reputation entirely, of being the man no other clubs want to deal with.
A businessman at heart as well as a boyhood Spurs fan, Levy has always had a reputation for being ruthless and driving a hard bargain.
It was one of the things that earned him respect, and made him one of the longest serving chairmen in the Premier League.
But the way he has handled certain situations in recent years has led to a growing dislike and mistrust from other clubs who are now said to be refusing to deal with Tottenham.
List of clubs refusing to deal with Spurs continues to grow
The paper claims the Saints will refuse to sell Victor Wanyama to Spurs next season and are considering whether to deal with them at all in the future.
It stems not only from Spurs' pursuit of one of their star players this summer but also last when they refused to take 'no' for an answer over Morgan Schneiderlin.
This summer also hurt relations between the two clubs as Southampton were unhappy with the way Daniel Levy went about nabbing Toby Alderweireld from their grasp.
And let's not forget all this not so long after luring away Southampton's manager Mauricio Pochettino and highly regarded scout Paul Mitchell.
West Bromwich Albion are another Premier League side Tottenham upset this summer over their pursuit of striker Saido Berahino.
Berahino was so unsettled by Tottenham's relentless interest he even refused to ever play for the Baggies' chairman Jeremy Peace again last week.
The Midlands club were clearly exasperated by the tactics of Levy who Peace felt had left it unrealistically late and regarded some of their offers as derisory.
'There are some people you just can't do business with'
Hammers chiefs vowed never to do business with Levy again, co-owner David Gold exclaiming: "No matter how hard you try, there are people out there that you just can’t do business with" after the Spurs chairman intervened at the 11th hour to pull the plug on outcast Emmanuel Adebayor's deadline day move to east London.
It wasn't just transfer dealings that were getting up the noses of other chairmen, though.
The battle was so bitter it even reached the courts as Karren Brady, West Ham United's vice-chairman, had her mobile telephone records "unlawfully obtained by subterfuge" at the height of the ill-tempered contest with Spurs over the 54,000 seater stadium, as reported by the Independent at the time.
Real hard bargains leave lasting damage
Tottenham's attitude towards Real Madrid's mega deals for Luka Modric and Gareth Bale was obviously to look after the best interests of the club and drive the best price possible.
But in pushing so hard for the best possible deals they have not won many friends in the Spanish capital and have lessened their chances of future compliance as a result.
That short-term financial gain, much of which has been wasted in the transfer market since, has left long-term damage.
In the past Manchester United were also said to be reluctant to recruit players from Tottenham under Sir Alex Ferguson after their experience of buying Michael Carrick and then Dimitar Berbatov from Levy.
While Ferguson conceded the chairman's tactics were in the best interests of his club, perhaps a different approach would have been more beneficial had Spurs taken a longer-term view, much like Southampton.
There are no allies in the transfer market, but Tottenham may have more dead ends than most when it comes to the next couple of transfer windows at least.