The Italian star Gianluigi Donnarumma is seen as one of the best keepers in the world – but Arsenal will focus.
The Paris Saint-Germain no. 1, 26, broke the hearts of England at Euro 2020.
He helped Liverpool dump this year's last 16 of this year's Champions League and then frustrated Aston Villa in the quarterfinals.
Donnarumma has now played more than 400 senior games, but there is concern about his inability to deal with corners and crosses.
He can also be suspicious with the ball on his feet.
Arsenal manager Mikel Arteta will certainly tell his players to shoot crosses in the box and they will look to get the most out of their set pieces.
The shortcomings of Donnarumma were exposed in October to the loss of 2-0 in Arsenal in the group stage.
The first goal of the Gunners saw a hesitant Donnarumma beating when Kai Havertz expected a cross from Leandro Trossard and nodded inside.
Donnarumma was beaten again when the low free kick of Bukayo Saka went straight under him.
The image of the Italian on the ball may have been obscured, but there didn't seem to talk between Donnarumma and his defenders.
Last season in the first leg of the Champions League quarter final against Barcelona, Donnarumma did not come for a corner and Andreas Christensen led a winner.
Despite his impressive status – he is 6ft 5 – he was rooted on his line and he didn't seem sure how he could judge the ball of the ball.
Earlier in that match, Donnarumma struggled with Lamine Yamal's Cross and Raphinha brought Barca ahead.
The hesitation of Donnarumma repeated itself in the semi-final return bone against Dortmund when Mats Hummels were undisputed to go from the left in the corner of Julian Brandt.
The ex-Milan Hero also made blunders who tried to give the ball out of the defense in some Ligue 1 matches in the last two terms.
In the Nations League in March he was too busy with a fight with his teammates from Italy to note that Joshua Kimmich had taken a corner from Germany and Jamal Musiala was ready to tap into an empty net.
By the time Donnarumma had realized what happened, Germany had scored.
He was also blamed for the defeat of PSG by Liverpool in the first stage of the Last-16-Confess, so that Harvey Elliott's 87th minute could glide into efforts.
Similarly, the keeper made up for it by saving Darwin Nunez and Curtis Jones in the shootout in Anfield.
Yet the biggest moment of Donnarumma came on Wembley four years ago when he saved the penalties of Jadon Sancho and Saka in England in the shooting for Italy to be crowned Kings of Europe.
Earlier this month, a headlist of L'-equipe was: 'God saves Donnarumma' in reference to him that reached the semi-finals of the Champions League-Halve finals.
After Friday's 3-1 defeat against Nice, PSG saw their undefeated competition record losing, the same newspaper gave him a number of 3/10.
Donnarumma did not come for high balls on two of the goals and Arsenal will hope for more of the same on Tuesday evening.