We look at the trend of tennis stars employing their heroes, with Novak Djokovic and Boris Becker explaining how they came together.
Mats Wilander speaks to Djokovic and Becker, and also hears from Stefan Edberg and Roger Federer as the four explain how their relationships started.
Andy Murray, of course, was the first of the so-called 'big four' to ask a former Grand Slam winner for advice, tasking Ivan Lendl with helping him win a maiden Grand Slam. And that worked out rather well for Andy.
And with a resurgent Radael Nadal returning to the top of the rankings, Djokovic and Federer also looked to the past in search of the extra boost needed to catch the Spaniard.
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