Rodrigo Palacio lifts a shot high over the Celtic crossbar.

Celtic have started the second half brightly. John Guidetti has been caught offside a couple of times but the Inter defence have looked vulnerable.

Greg McEwan on Twitter: "I'd have left Biton at CH and brought Johansen in beside Broony - I'd have left Ambrose on the bus! #bbcscotfootball"

Barry Booth ‏on Twitter: "the other beneficiaries from going down to ten men are Aberdeen! #bbcscotfootball"

Second half underway.

How much will Virgil van Dijk's dismissal impact Celtic's chances at the San Siro?

Image source, SNS

Alasdair Lamont
BBC Scotland at the San Siro

"Very encouraging 45 minutes for Celtic but the dismissal of Virgil van Dijk could well be pivotal to the eventual outcome.

"Other than that, they can be very happy with their first-half performance, with Craig Gordon proving just what a great goalkeeper he is at times."

It's goalless at the break but Celtic, down to 10 men following Virgil van Dijk's red card, face an almighty task if they are to get the advantage that would take them through to the next round.

Donald McInnes on Facebook: "Seems like a good game, following it here whilst on holiday in Oz. Ungodly hour but hey it's Celtic. It's going to be a hard test for Celtic and I am sitting on the fence about the outcome, nevertheless C'Mon the Hoops

Alan Rankin on Facebook: "Boring game, we had been treated to 4 goals by this time last week"

Michael ‏on Twitter: "Celtic really need to get into half time at 0-0 #bbcscotfootball"

MBEHAN on Twitter: "What was worse the refereeing decision or Icardi's reaction (both very poor) #bbcscotfootball"

Leon Hay ‏on Twitter: "Difficult to see Celtic being able to hold on for so long. #bbcscotfootball"

Into the second and final minute of first-half stoppage time.

Virgil van Dijk was shown a red card after picking up two bookings at the San Siro.

Image source, SNS

Couple of chances in quick succession inside the Celtic box. Juan Icardi's shot is deflected into the path of Xherdan Shaqiri, who draws a fine block from Craig Gordon.

Celtic make a change following the dismissal of Virgil van Dijk. Defender Efe Ambrose replaces winger Gary Mackay-Steven.

Juan Icardi connects with the resulting free-kick and his header looks netbound until Craig Gordon scoops the ball over. The offside flag had been raised but that was an impressive blocked by the Scotland goalkeeper.

Celtic are down to 10 men as Virgil van Dijk picks up a second yellow card after fouling Juan Icardi on the left-hand side.

Gary Mackay-Steven drives at the Inter defence from the halfway line and tries to slip in Stefan Johansen on the left but the Norwegian midfielder's touch lets him down and the hosts get it clear.

Celtic goalkeeper Craig Gordon confidently plucks the ball out of the air after a cross from Fredy Guarin travels in from the Inter right.

Nick from Burnley: "Celtic playing 4-3-3 away at the San Siro, absolute bottle, they're creating a proper end to end European game, this is why I love Celtic!"

Celtic defender Virgil van Dijk is booked for barging into Rodrigo Palacio. That means the Dutchman will incur a one-match suspension.

James in Giffnock: "Celtic really have to score first, then it will be a cracker."

Alasdair Lamont
BBC Scotland at the San Siro

"Midway through the first period and Celtic are very much in this contest, which is raging from end to end. It's every bit as open as the game at Celtic Park, all we're lacking are the goals!"