Penalty to Juventus! Parejo commits a foul seconds after Juve hit the bar.
42'
Batshuayi fires over the bar from the edge of the box.
37'
Meanwhile, the game continues and Valencia with the crowd behind them have got the wind in their sails.
34'
Ronaldo has left the field in tears after a long protest. Still at a loss to explain exactly what happened there, but there didn't seem to be much to deserve a red card.
Ronaldo is sent off! The referee, after consulting with the official behind his goal, has chosen to give him a red card. There was an incident in the box but replays show Ronaldo hasn't done much. That is a talking point.
Khedira has picked up a knock and will be replaced by Can.
21'
And another! Somehow Neto in goal denies about three Juventus players in succession from tapping the ball home!
17'
How has this not gone in? The ball is squared to Khedira but he hits the ball over the bar three yards from goal.
16'
The game has still not really got going. Both teams are still moving through the gears, although Juve look more threatening.
16'
The game has still not really got going. Both teams are still moving through the gears, although Juve look more threatening.
11'
Close! Ronaldo hooks a shot on the volley and it falls to Mandzukic underneath the crossbar but he puts the ball over the net!
7'
Juventus are struggling to impose themselves in these opening minutes and it is LOUD in the Mestalla!
3'
A bright start from Valencia as Guedes lashes one over the bar.
1'
We are underway!
Start of match
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The teams are in the tunnel and it is almost time!
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Valencia have made six changes from the side which drew 0-0 with Real Betis at the weekend. Neto, Vezo, Wass, Soler, Guedes and Batshuayi are the new men in.
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Bernadeschi comes in for Dybala and Miralem Pjanic returns to the starting lineup.
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We are still waiting for the Valencia team, but Juve have not made any surprising selections in their lineup. Allegri confirmed in his press conference yesterday that only one of Dybala or Mandzukic would start and it's the Croatian who gets the nod.
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And the Juventus starting XI: Szczesny, Cancelo, Bonucci, Chiellini, Alex Sandro, Khedira, Pjanic, Matuidi, Bernardeschi, Mandzukic, Ronaldo
A result is imperative for both teams tonight. With Manchester United also in the group we will see a big name drop out by the time the opening stages of the competition are over.
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Cristiano Ronaldo will likely make his Champions League debut for his new team, and the competition's top scorer has a lot going in his favour. Not only has he scored 120 times in Europe's premier competition, but during his time at Real Madrid his record away at Valencia in all competitions was stunning.
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The Italian champions face a tough match at the Mestalla, where Valencia will provide tough opposition for just about any team. However, they might have a trick up their sleeve.
Pre-match
19 September 2018, 21:00
Referee: Felix Brych
Stadium: Mestalla
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Good evening and welcome to our live updates for Valencia's home Champions League clash against Juventus!