Inter 4-3 Barcelona result - Davide Frattesi's extra-time strike sends Nerazzurri through to UEFA Champions League final in classic contest

Dumfries long throw ricochets kindly for Mkhitaryan, who thinks: 'why not?' from 25 yards out.

The midfielder unleashes a volley that drifts agonisingly wide of the far post, with Szczesny nowhere near.

Barca counter with Dani Olmo leading the charge, before sliding the ball to Yamal.

The latter is going away from goal and cannot set himself before poking wide of the target.

Calhanoglu caught Dani Olmo late during the build-up, and is shown a yellow card by the referee.

The visitors have enjoyed plenty of possession since falling behind.

However, the Inter defence continues to stand firm.

It's worth noting Inter are unbeaten in each of their last 15 home games in the Champions League, winning 12.

The Nerazzurri have also won nine of their 11 European semi-final matches on home soil.

Those are the statistics Barca must defy if they are to overturn their deficit and progress to the final.

Barca seek a response and Dani Olmo looks to prod the ball home from close range, but can only stab it wide.

There is a brief check for a potential penalty, but things swiftly move on.

His participation in this second leg was doubtful right up until the teamsheets were submitted this evening.

Lautaro has certainly justified the decision to include him with goal number nine in this season's Champions League.

Trust him to have a say in this second leg!

Moments after Barella tests Szczesny with a fierce volley from a tight angle, Inter maintain the pressure and take the lead.

The Nerazzurri cut their opponents' defence open and Dumfries is played in behind.

The wing-back unselfishly squares the ball for his skipper to tuck into an empty net.

Bastoni brings the ball out of defence and releases Mkhitaryan down the left flank.

The latter sends a low cross in towards Lautaro Martinez, but Inigo Martinez reads it well and makes an important clearance.

Following his wonderful individual effort last week, Yamal took his goal tally for this season's Champions League to five.

Erling Haaland (10 in 2019-20), Kylian Mbappe (six in 2016-17) and Raul (six in 1995-96) are the only teenagers to find the net more times in a single campaign.

The teenage sensation cuts inside onto his left foot, and lets fly from the edge of the D.

However, his attempt is straight down the throat of Sommer.

Lautaro plays a neat throughball and Thuram is bearing down on goal.

The forward hesitates at the vital moment, and his attempt to round Szczesny is blocked by the Barca goalkeeper.

Thankfully for him, the offside flag is subsequently raised.

Last week's two-goal hero, Dumfries finds himself in an advanced position inside Barca's box.

However, he takes too long, and is eventually dispossessed.

It is certainly on for Barca, who have already won the Spanish Super Cup and Copa del Rey this season.

Four points clear at the LaLiga summit with four games remaining, they are also potentially just two wins away from getting their hands back on this trophy.

Barca work their way towards the Inter area with a sweeping move.

Raphinha whips a low ball into the box from the left, but the hosts tidy up easily enough.

Barca win possession and Yamal immediately seeks out the run of Torres.

His shot is deflected away from goal, but the offside flag is subsequently raised against him.

The referee blows his whistle and Inter get this eagerly anticipated second leg under way.

The two teams make their way out into the San Siro cauldron.

They now observe the iconic Champions League anthem, and we are almost ready to go...

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Both sides finished the inaugural league phase with 19 points from a possible 24, with Barca finishing second - two places ahead of Inter due to a superior goal difference.

Finishing in the top eight sent the two teams straight through to the round of 16.

There, Flick's side beat Benfica before overcoming Borussia Dortmund in the quarter-finals, while the Nerazzurri saw off Feyenoord and Bayern Munich.

Will it be an eighth European Cup final for Barca, or a seventh for Inter?

The big news from the submitted team sheets is the inclusion of Lautaro, who has shaken off a thigh problem to lead Inter in this second leg.

Simone Inzaghi's side are unchanged from last week's reverse fixture, though Benjamin Pavard - who played under Hansi Flick at Bayern Munich - misses out with an ankle injury.

Meanwhile, Barca's only alteration - and the sole one for both sides - from the first leg sees Eric Garcia replace the injured Kounde at right-back.

However, the most significant news is from the bench. Like Lautaro, Lewandowski has recovered from a thigh issue in time to take his place in the squad.

And the visitors...