Cristiano Ronaldo defended himself following an angry reaction to Portugal's substitution.

Portugal manager Roberto Martinez defended an angry Cristiano Ronaldo after he kicked a water bottle after being substituted in the shocking 2-0 loss to Georgia.

The Al Nassr striker lasted just over an hour before being hooked by Martinez, who was looking for an answer to goals from Khvicha Kvaratskhelia and Georges Mikautadze when he replaced Ronaldo with Goncalo Ramos.

A response was not forthcoming, with Ronaldo watching from the bench as Portugal suffered what was statistically the largest upset in the history of the European Championships against a Georgian team ranked 66 places lower in FIFA's world rankings.

Ronaldo was seen kicking a water bottle before taking his position on the bench, expressing his emotions following a tough outing.

Ronaldo had been penalized earlier in the game for his outbursts at the referee after colliding with centre-back Luka Lochoshvili, who was obviously pulling the Portugal striker's shirt but managed to avoid a penalty.

Martinez maintained after the game that Ronaldo should have been handed a "clear" penalty, questioning the VAR's consistency before awarding a spot kick to Mikautadze for Georgia's second.

"At times, we were unlucky," Martinez told reporters. "The VAR was inconsistent; if there was a penalty on Antonio Silva, Ronaldo could see it more clearly.

"Georgia had the game of their lives and we didn't match the intensity."

Ronaldo's tumultuous evening didn't finish there; as he exited the pitch, he nearly escaped a weird altercation with a fan.

As Ronaldo proceeded down the tunnel, a fan jumped over the fence and was pushed aside by security before making touch with the 39-year-old, who had previously been targeted by pitch invasions during Portugal's triumph over Turkey in the tournament.

Portugal has been drawn with Slovenia in the competition's last 16, with their match on Monday night being the last to be decided before the quarter-final stage begins.