I'm sorry, Cristiano! Aaron Ramsey apologises to Ronaldo for denying him Juventus goal - in pictures

Ball was about to cross the line when Ramsey 'made sure' - and then had to do some explaining

Aaron Ramsey follows up Cristiano Ronaldo's free-kick before scoring from close range. AFP

Ramsey steers the ball home from close range. AFP

Juventus midfielder Aaron Ramsey celebrates scoring his goal with Cristiano Ronaldo and team mates. Reuters

Aaron Ramsey discusses his goal-line tap-in with Cristiano Ronaldo. Reuters

Juventus star Cristiano Ronaldo listens to coach Maurizio Sarri after he is substituted for Paulo Dybala. Reuters

Aleksei Miranchuk (C) of Lokomotiv Moscow celebrates with teammates Eder (L) and Joao Mario (R) after scoring the equaliser against Juventus. EPA

Juventus coach Maurizio Sarri watches from the sidelines. EPA

Douglas Costa finishes his incredible run to score the winner for Juve. AP

The celebrations start for Douglas Costa and Argentine forward Paulo Dybala after the winner. AFP

Juventus players join the fun after their late winner against Lokomotiv Moscow. EPA

Aaron Ramsey has apologised to Cristiano Ronaldo after denying his Juventus teammate the opening goal in the 2-1 win over Lokomotiv Moscow.

Douglas Costa scored the winning goal in the 93rd minute to send Juventus through to the Champions League knockout stages, but it was Juve's first that risked upsetting the Portuguese striker.

With seven changes from Saturday's derby win over Torino, Juventus took the lead with their 300th Champions League goal in confusing circumstances in the fourth minute.

Ronaldo curled in a free kick from the left flank and Lokomotiv goalkeeper Guilherme let the wet ball slip through his hands. As it rolled over the line, former Arsenal midfielder Ramsey poked it into the net. UEFA credited Ramsey as the scorer.

"I thought the keeper was a lot closer to me and had a chance of diving back and maybe clearing it," Ramsey said. "My instinct took over to make sure that it went over the line. I've apologized to Cristiano."

Juve's lead lasted just eight minutes before Alexei Miranchuk leveled for Lokomotiv, knocking in the rebound after his header hit the post.

Guilherme made a string of good saves to keep Lokomotiv in the game, making up for his earlier blunder before a moment of individual brilliance from Costa.

The Brazilian picked up the ball on the left flank and cut inside past three defenders. He then played a one-two with Gonzalo Higuain, dodged two more Lokomotiv players and knocked the ball through goalkeeper Guilherme's legs.

Juventus' substitutes came onto the pitch to celebrate as  Costa pulled off his shirt. It was his first goal of the season after a long absence with a muscle injury.

"This was a really important game because I have been out for a long time but I have come back and helped the team," said  Costa, who was a 70th-minute substitute.

The goal ensured Juventus qualified from Group D with two games to spare.

Bayer Leverkusen upset Atletico Madrid 2-1 in Wednesday's other game in the group, leaving Juventus with a three-point advantage over Atletico at the top of Group D.

"We still have work to do to finish top but we achieved our target of qualifying tonight, so we're happy that we've done that," Ramsey said.

Leverkusen and Lokomotiv are likely fighting for third and a spot in the Europa League. They're level on three points.