Imagine for a moment a starting lineup with Gareth Bale on the left wing and Antonio Valencia down the right, with Robin van Persie patrolling the striker position and either Wayne Rooney or Shinji Kagawa settling just behind him atop the midfield.
That's a terrifying thought. The Premier League would pretty much be United's oyster if that was allowed to happen.
And that's why, among other reasons, Tottenham absolutely must not sell Bale—easily the Premier League's best player this season—to Manchester United over the summer.
But as Matt Law of the Mirror notes, the Red Devils plan to pursue the classy winger nonetheless:
Manchester United will test Tottenham's resolve to keep Gareth Bale.
And United believe 23-year-old Bale would favour a switch to Old Trafford over a move to Real Madrid if Spurs can be persuaded to sell.
Tottenham chairman Daniel Levy values Bale at £60 million and may well attempt to stop the Wales winger joining another English club.
A new £170,000-a-week contract offer is also being drawn up.
United are prepared to sweeten their bid by offering Spurs the likes of Anderson and Nani—two players Villas-Boas is known to admire.
If Spurs finish in the top four, this is pretty much a moot point. You have to think that would be enough to keep Bale away from teams like Manchester United or Real Madrid, at least for another year. And yes, a £170,000-a-week contract would help, too.
I probably don't need to tell you why United will likely do whatever it takes to obtain Bale's services this summer, or that any other club with the money to splash on him will attempt to do the same. After scoring 25 goals and adding 10 assists from out wide in all competitions this year, Bale is arguably going to be the most sought-after player this summer.
He's essentially carried Tottenham all season long, and he would be the perfect summer addition for United playing as a left-winger. For United fans longing for the Cristiano Ronaldo days of old, adding Bale would be the next best thing.
It's hard to imagine United not repeating as champions next season if Bale is added. Tottenham only need to recall their hated rivals, Arsenal, selling Van Persie to Old Trafford last season and the effect that had on the league.
If Spurs fail to finish in the top four, Bale is going to be hard to hold on to. The club must not sell him within the Premier League and especially not to the defending champions. There will be plenty of other suitors, after all.
You could make the argument that Spurs shouldn't sell Bale at all—losing him would be a major setback for the club—but a team like Real Madrid might make them an offer they can't refuse this summer. And if Bale wants to pair with Ronaldo in Madrid, it could be very difficult to keep him around.
In the end, it's pretty simple—Bale would be the perfect addition for United, and Tottenham simply can't let that pairing happen. Spurs may lose their best player this summer, but they can't lose him to the defending Premier League champions by selling United a player capable of dominating the league for years to come.