Emotions were high after Malmö's 1-0 victory at 3 Arena.
Olsen had shown his dissatisfaction with the home crowd's booing of Pontus Jansson as the centre-back was carried off on a stretcher with a suspected knee injury.
"We don't know what the injury is, but I'm afraid it's something. He's my closest friend, of course I react," Robin Olsen tells TV4.
The former national team goalkeeper made gestures towards the home team.
"I was just incredibly happy and relieved. I'm celebrating, and yes..." says Olsen.
Immediately after the final whistle, Hien confronted Olsen. More players were quickly involved in heated exchanges.
The match required 18 minutes of stoppage time before referee Fredrik Klitte blew the whistle for full time.
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