The Republic of Ireland international did not back down for a second.
Robbie Brady and David Luiz got right into it at Stamford Bridge but, luckily for them both, their teammates and the referee got involved.
Chelsea were expected to see off Sean Dyche's Burnley side with relative ease as the Premier League returned with bangs all over the country. Many have offered up their thoughts and predictions on 2017/18 but no-one foresaw Burnley being 3-0 up on the reigning champions after 45 minutes.
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Ireland defender Stephen Ward got in on the scoring act as he walloped home the Clarets' second goal [below] but Brady came to the attention of the Chelsea crowd after the break.
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Brady and Luiz clashed on 47 minutes after Burnley striker Sam Vokes gave away a free in the Chelsea box. The Brazilian took exception to Vokes' physicality but the Dubliner was at hand to put him right.
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Brady did not flinch as the taller Luiz stepped to him and he more than stood his ground. In fact, he seemed to find the whole affair amusing and shared a few words with the defender.
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Willian interjected on Luiz' behalf while Jeff Hendrick stepped in to push the Chelsea man back.
No action was taken but Brady was yellow-carded for a tackle on Willian about 10 minutes later.
Luiz found the net to make it 3-2 as Chelsea staged a late comeback while the Burnley man could have sealed it but cracked a drive off the Blues' crossbar.
Dyche's men held out, though, as Chelsea lost on the opening day for the first time in 19 years.
