He tricked his way past two challenges on to the edge of the Czech Republic box before being brought down.
But the referee waved away protests for a foul, insinuating that Saka went down too easily.
As play continued further down the pitch, the match official called over Saka for a word.
And the Arsenal star could be seen repeating three words in protest to the earlier decision.
“He touched me,” Saka could be seen saying.