Hello and welcome to Eurosport's live commentary from the Champions League Round of 16 second leg fixture between Zenit St Petersburg and Benfica. This is Nick Royle (@nickaroyle) taking you through all the action from the Petrovski Stadium.

Gaitan is playing on the right of Benfica's 4-4-2 in St Petersburg - Zenit look as if they have started with a 4-5-1.

Lindelof makes a convincing header to clear from Dzyuba, then Semedo concedes a foul from second phase possession on the right.

Zenit are in the usual sky blue shirts and shorts, Benfica all in red, and it is the hosts who kick off from left to right.

Villas-Boas talking to BT Sport Europe. "We need to produce a little more, create more chances, with the strength of our attack and the strength of our stadium. But we have be cautious so we don't concede, then get the goals we need in any way possible."

However, Benfica have a decent record in ties in which they have held a first leg lead, progressing 46 times from 54 matches.

Villas-Boas expects Benfica to keep it tight and protect their lead in St Petersburg tonight. "Benfica always play very compactly," he said. "They are good in combination play. It is always difficult to find space in how they set up defensively, but we must do that.

Zenit coach Villas-Boas has backed Hulk to come good after a spell of indifferent form. "Hulk is eager to play and win, he has already written his name into the history of Zenit and continues to do so today," the Portuguese said. "Any player can have an off day, this is football. We believe that tomorrow we will be able to fix our mistakes, create chances and take them."

It is 1C in St Petersburg tonight and there may be some fog around later.

Greece international striker Kostas Mitroglou, an £11m flop at Fulham, made it eight goals in his last eight appearances with the winner against Sporting.

Benfica come into the match on a fine run of 11 wins in 12 league matches, and 15 wins from their last 16 games in all competitions, and the Eagles top the Portuguese Liga after beating Sporting 1-0 at the weekend.

Fifth-placed Zenit were held to a goalless draw at Krasnodar in their first Russian league match for three months at the weekend, and Villas-Boas' side sit nine points behind leaders CSKA Moscow.

Aleksandr Kokorin makes his first Champions League start in place of Oleg Shatov, while Domenico Criscito is suspended after being sent off in the first leg in Lisbon and Javi Garcia is also serving a ban after accumulating five bookings in the competition, so Luis Neto and Yuri Zhirkov deputise.

Ezequiel Garay is not to fit to start at the Petrovsky, so Mauricio comes in, one of four changes from the first leg for Zenit as head coach Andre Villas-Boas targets the 'historic moment' of qualifying for the Champions League quarter-finals.

ZENIT ST PETERSBURG: Lodygin, Anyukov, Lombaerts, Luís Neto, Maurício, Danny, Witsel, Zhirkov, Hulk, Kokorin, Dzyuba...Subs: Kerzhakov, Smolnikov, Garay, Ivanov, Yusupov, Shatov, Dolgov.///BENFICA: Ederson, Lindelöf, Eliseu, Semedo, Fejsa, Samaris, Gaitán, Renato Sanches, Mitroglou, Jonas, Pizzi...Subs: Paulo Lopes, Sílvio, Rúben Dias, Salvio, Jiménez, Gonçalo Guedes, Talisca.

Benfica head coach Rui Vitoria has made three changes from the side that won the first leg, with Jardel and full-back Andre Almeida suspended and goalkeeper Julio Cesar out with a thigh injury. Ederson starts in goal, with Nelson Semedo and Ljubomir Fejsa coming into the back four.

The Petrovsky Stadium is a sell out tonight as Zenit look to become the first Russian teams since CSKA Moscow in 2010 to make the quarter-finals of the Champions League.

Zenit are hoping to claw back a 1-0 deficit from the first leg in Lisbon on 16 February, following Jonas' injury-time strike at the Stadium of Light.