Very rarely did Sir Alex Ferguson fail to get his way at Manchester United, but back in the summer of 2009, that's exactly what transpired.
Having nurtured and transformed Cristiano Ronaldo from a scrawny teenager to the most sought-after star in world football, the legendary Scot was left to reluctantly accept the Portuguese sensation was moving on to pastures new. But not just anywhere, to Real Madrid - a club Ferguson insisted he "wouldn't sell a virus" to.
The Spanish giants had piled pressure on Ronaldo and United for well over a year prior to his transfer as they relentlessly pursued the Premier League's most prolific asset. And though Ferguson fought to bat away the La Liga side's incessant advances, he would eventually see his resistance broken.
