Cover Photo: Jean Catuffe/Getty Images

Betting on Roger Federer to take care of business against unranked opponents in tournaments like the U.S. Open is almost always a solid bet, but the keyword here is almost. 

But if it comes down to wagering $25,000 on Federer just to take home $500 against an opponent like John Millman in the U.S. Open, you should probably recognize the risk vs. reward ratio here. 

Unfortunately for one Australian national, clearly not everyone did. 

Adding irony to insult, Millman is a fellow Aussie too. Millman also crashed this bet pretty quickly by wrapping up Federer in four sets.

It also couldn't have felt great to lose $25,000 while watching Millman use the spotlight after defeating Federer to voice his priority for a fantasy football draft the following morning. 

Perhaps, if there is one lesson to be learned here, it's not to bet against a fellow countryman in tennis matches with heavy favorites like Federer. 

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David Hayes is not a FanDuel employee. In addition to providing DFS gameplay advice, David Hayes also participates in DFS contests on FanDuel using his personal account, username DavidWHayes. While the strategies and player selections recommended in his articles are his personal views, he may deploy different strategies and player selections when entering contests with his personal account. The views expressed in their articles are the author's alone and do not necessarily reflect the views of FanDuel.