Martin Dowden
BBC Sport Scotland

Celtic’s defending has been poor overall against a side that have not lived up to the hype despite the scoreline.

Brendan Rodgers must be so frustrated after the promise of the first leg. His side failed to create many genuine chances with Andrei Lunyov a virtual spectator until Olivier Ntcham fired straight at the goalkeeper and Rogic also tested him.

They have been picked off far too simply, simple as that.

It is an all too familiar script for Celtic away from home in European competition.

On-loan Chelsea midfielder Charly Musonda is thrown on by Brendan Rodgers.

James Forrest, who has been in fine form this season, is hauled off, shoulders sloped in disappointment after an anonymous performance.

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

Image source, Reuters

Scott Sinclair weaves into the Zenit penalty box and finds Tom Rogic 12 yards from goal.

The Australian's poked effort is again straight at Andrey Lunyov, but at least Celtic are finding the target.

They might be wondering why they were not more adventurous earlier.

At last, a Celtic shot on target.

Olivier Ntcham's snap shot from 18 yards is, however, straight at goalkeeper Andrey Lunyov.

As Zenit celebrate, Celtic do make the change, with Scott Sinclair replacing Callum McGregor, the scorer of the only goal of the first leg, in midfield.

It sounds like Scott Sinclair might be coming on, the former Aston Villa winger having a chat with Celtic manager Brendan Rodgers.

Celtic manage to string a few passes together and win a corner.

Kristoffer Ajer rises to meet Olivier Ntcham's cross, but the big defender heads wide under pressure.

Celtic have more possession, but it is fairly scrappy stuff and Zenit are looking the more incisive outfit on the break.

A second effort on goal from Celtic already.

Olivier Ntcham's low grasscutter is well wide, but the visitors have shown more attacking intent in the first two minutes of the second half than in the whole of the first.

Tom Rogic is immediately in the thick of the action and the Australia midfielder fires a couple of yards over the Zenit crossbar from just outside the penalty box.

Celtic get the second half under way.

Tom Rogic has replaced Eboue Kouassi in midfield at the break.

Zenit are out early, looking enthused by their first-half performance.

They are followed by Celtic, including half-time substitute Tom Rogic.

Penny for your thoughts Brendan? Stick or twist?

Does he change personnel and tactics to get a precious away goal back?

Zenit have pushed up on Scott Brown and nullified the influence of the Celtic captain in front of his back four.

However, remember, Celtic only need to score once to go through as it stands.

Image source, SNS

Image source, SNS

Scott McDonald
Former Celtic striker on BBC Sportsound

Steven Thompson
Former Scotland striker on BBC Sportsound

Martin Dowden
BBC Sport Scotland

The formula that worked at Celtic Park is not working here. Brendan Rodgers’ side have enjoyed a fair degree of possession but have been unable to do much with it with Andrei Lunev completely untested.

Tom Rogic looks to be warming up. It seems Rodgers is going to change things and he has shown an ability to alter the course of matches in the past with a change of personnel and tactics.

One goal is all Celtic need to progress if they don’t concede. On the evidence of the two goals they lost, that appears a tall order.

Celtic were calling for a second yellow card for Zenit scorer Daler Kuzyaev following a late challenge after the half-time whistle on Eboue Kouassi.