Guus Hiddink wants his Chelsea players to continue showing a physical edge in the Premier League amidst their scale up the table.
The Dutchman bore witness to their aggressive side not long after arriving in west London when Diego Costa and Oscar were involved in a training ground bust-up.
He insists there was no animosity between the two and is now encouraging the Blues to show similar fight as the business end of the campaign looms.
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Asked if he likes to see fight from his players, according to Sky Sports, Hiddink said: "Yes, with respect.
"In the same second they [Oscar and Costa] knew, because they are friends, that they were threatening each other, and deep down asked 'what are we doing?'
The Dutchman further insisted that showing such hunger and passion will greatly benefit Chelsea's prospects.
"I like when they go on the edge," he continued. "Not fighting but resistance.
"The best players in the league are also strong players, you feel that. There are a lot of benefits to gather when you are well equipped with your balance and your physical fitness."
And physical fitness is exactly what the Blues will need given the Premier League's famed brutality and speed, let alone the fact they currently sit tenth and face an uphill battle to claim a place in Europe.
Hiddink believes that Willian epitomises such strength and has played a vital role in Chelsea's improved defensive game.
He said: "It's not always you have to be a big, big guy but when I see for instance, you see it often in the defensive part of the game."
"For instance, Willian is not a big guy but is fighting into duels defensively as well. He's smart to do so and willing to do so. That's the modern footballer."