Extending a tiebreak that deep requires fierce mental tenacity (and usually, a big serve) and a player unmotivated to stay in London would be flushed out fast.

WSJ: 2012 London Olympics: Andy Murray Vanquishes His Doubters

Be it back-office or assembly-line, one single unmotivated team member is not only difficult to manage but can bring down the moral of an entire team.

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