Napoli and Benfica clinched places in the Champions League last 16 on Tuesday as Group B rivals Besiktas unravelled in a 6-0 defeat away to Dynamo Kiev.

Jose Callejon and Dries Mertens scored second-half goals to earn Napoli a 2-1 victory over Benfica in Lisbon to send the Italians through as group winners.

Twice former European champions Benfica qualified as runners-up after Besiktas, who would have advanced with victory in Ukraine, crashed to a humiliating defeat and finished with nine men.

Manchester City striker Kelechi Iheanacho made a successful start to his spell as Sergio Aguero’s stand-in by earning his team a 1-1 Champions League draw with Celtic.

Arda Turan grabbed a hat-trick and Lionel Messi his 10th Champions League goal of the season as a much-changed Barcelona still cruised past Borussia Moenchengladbach 4-0.

Messi continued to cut the gap on Cristiano Ronaldo as the Champions League’s all-time top goalscorer when he slotted home the opener after just 16 minutes.

Turan then struck his first Barca hat-trick in a 17-minute second-half spell as the hosts took out their frustration on a dispirited Monchengladbach.

A Robert Lewandowski free-kick sealed Bayern Munich‘s 1-0 win over Atletico Madrid in the Champions League with both teams already through to the knock-out stage.

Despite the result at Munich’s bitterly cold Allianz Arena, Atletico go into the draw for the last 16 as Group D winners with Bayern second.