UCL round-up: Man City, Leipzig into last 16; Atletico Madrid stun Celtic 6-0; Barcelona lose to Shakhtar

Holders Manchester City and RB Leipzig became the first teams to reach the last 16 of this season's Champions League on Tuesday while Danylo Sikan's goal allowed Shakhtar Donetsk to claim a stunning win over Barcelona.

Pep Guardiola's reigning champions have eased into the knockout phase with a perfect record, a 3-0 win over Young Boys making it four wins out of four in Group G.

Erling Haaland followed his brace in Bern two weeks ago with another two goals against the Swiss side, with the Norwegian striker opening the scoring from the penalty spot midway through the first half.

Phil Foden got their second in first-half stoppage time and Haaland struck again soon after the interval for his 15th goal of the campaign.

Young Boys were then reduced to 10 men as Sandro Lauper was sent off, and City saw out a 10th successive home victory in the competition.

"People say 'yeah, the group stage, it is easy', but you have to do it. In life, you have to do it when people expect you to do it," Guardiola told TNT Sports.

Leipzig joined City in securing progress from Group G thanks to their 2-1 victory at Red Star Belgrade.

Xavi Simons gave the German side an early lead with a lovely finish into the far corner, and Lois Openda made it 2-0 in the rain in Belgrade with his 10th goal this season.

Former European Cup winners Red Star pulled one back through a Benjamin Henrichs own goal but they are now left to fight it out with Young Boys for a place in the Europa League knockout phase.

Barcelona could have booked their last-16 ticket with a win over Shakhtar but instead the Ukrainian club kept their own hopes alive with a famous 1-0 victory in Hamburg.

Sikan, the 22-year-old forward, headed in the only goal of the Group H game late in the first half and Shakhtar held on.

Paris Saint-Germain and Newcastle United's hopes of qualifying from Group F remain in the balance after both lost on the road.

PSG went down 2-1 away to AC Milan despite Milan Skriniar giving the French side an early lead at San Siro.

Borussia Dortmund are top of the group after beating Newcastle 2-0 in Germany, with Niclas Fuellkrug and Julian Brandt scoring the goals, one in each half.

Atletico Madrid top Group E after crushing 10-man Celtic 6-0 in Spain to record their biggest win in the modern Champions League.

Antoine Griezmann grabbed an early opener and Celtic then had Daizen Maeda sent off midway through the first half.