Having missed Juve's opening two Group G games – a win over Dynamo Kyiv and a defeat to Barcelona – due to testing positive for coronavirus, Ronaldo, who scored twice on his return to Serie A action against Spezia, closed in on Iker Casillas' record of appearing in 20 successive Champions League seasons when he started in Budapest.

Miha Blazic's outstanding tackle prevented Ronaldo marking the occasion with a goal on Wednesday, though Juve had already taken the lead through Alvaro Morata's early effort.

Ronaldo did record an assist, however, setting up Morata to curl in a superb second before Paulo Dybala pounced on a goalkeeping error.

Lasha Dvali's own goal completed the rout, with Franck Boli snatching a late consolation at the other end in the closing stages.

Juve failed to register a shot on target in their defeat to Barca last week, yet Ronaldo had already tested Ferencvaros goalkeeper Denes Dibusz inside four minutes.

Andrea Pirlo's side had their opener three minutes later – Juan Cuadrado teeing up Morata to tap in.

Ronaldo looked set to make it 2-0 prior to the break, but Blazic made a wonderful challenge to prevent a certain goal, with Juve's number seven then forcing Dibusz into action after the restart.

After ignoring Morata for a chance he blazed wide, Ronaldo made no mistake three minutes later, supplying a neat pass into the Spaniard, who sent a fantastic finish into the top-right corner.

Morata made way shortly after and his replacement Dybala made a swift impact, tucking into an empty net after Dibusz failed to control a backpass. 

Another Dibusz calamity gifted Juve a fourth – Dvali only able to turn Dybala's strike in off the bar – though Boli did at least get Ferencvaros on the scoresheet when he finished on the rebound.