With their domestic league obligations concluded, Arsenal and Paris Saint-Germain are set to concentrate fully on their UEFA Champions League semifinal clash. Arsenal, having lost the Premier League title race, will face PSG, who recently suffered their first league defeat this season against Nice. Arsenal's lineup sees Mikel Merino back in his natural midfield position due to injuries and suspensions, with Leandro Trossard leading the frontline. PSG's squad is at full strength, and coach Luis Enrique must decide on his attacking options following standout performances from Desire Doue. The match promises a tactical battle, with both teams eager to capitalize on their current form and past encounters, including Arsenal's 2-0 victory last October when PSG lacked key players like Ousmane Dembele and Khvicha Kvaratskhelia.

Arsenal's focus shifts to the Champions League after missing out on the Premier League title, with Liverpool securing the championship following their victory over Tottenham.

Paris Saint-Germain, already crowned Ligue 1 champions, experienced an unexpected 3-1 loss to Nice, their first defeat of the league season, disrupting their invincible campaign aspirations.

Arsenal's squad adjustments include Mikel Merino returning to midfield due to Jorginho's injury and Thomas Partey's suspension, while Leandro Trossard steps into the forward line.

PSG's coach Luis Enrique faces a selection dilemma in attack, with Desire Doue earning another start after an impressive performance, potentially joining Dembele and Kvaratskhelia upfront.

The upcoming match is a rematch of their previous encounter where Arsenal won 2-0, a game missed by PSG's Dembele and before Kvaratskhelia joined, adding intrigue to the tactical dynamics.

Arsenal's starting lineup includes Raya as goalkeeper, with a defense featuring Timber and Saliba, a midfield led by Odegaard, and an attack supported by Saka and Martinelli.

PSG's lineup is bolstered by the absence of injuries and suspensions, presenting a strong team led by goalkeeper Donnarumma, with Vitinha and Neves in midfield, and a potent attack.

With matters settled in their domestic leagues, Arsenal and Paris Saint-Germain can give their complete focus to an intriguing UEFA Champions League semifinal.

Arsenal dropped too many points to remain in Premier League contention and Liverpool were confirmed as English champions when they hammered Tottenham on Sunday.

PSG are already Ligue 1 champions once again but suffered a surprise 3-1 defeat at home to Nice last Friday despite Luis Enrique sending out an XI similar to the one Arsenal can expect to face this week. It was the club's first defeat of the entire league season, ending their hopes for an invincible domestic campaign.

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The two sides met during the league phase last October, with Arsenal assured 2-0 winners. However, star forward Ousmane Dembele missed that match for the Parisians and Khvicha Kvaratskhelia's transformative mid-season arrival was still a couple of months away.

Thomas Partey was booked during Arsenal's 2-1 win at the Santiago Bernabeu and misses this game through suspension.

With Jorginho set to miss the rest of the season through injury, Mikel Merino is redeployed to his natural position in central midfield, despite having deputised up front for much of the season in place of Gabriel Jesus and Kai Havertz.

As such, Leandro Trossard will come into the forward line, flanked by Bukayo Saka and Gabriel Martinelli on either side.

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Arsenal starting lineup (4-3-3, right to left): Raya (GK) — Timber, Saliba, Kiwior, Lewis-Skelly — Odegaard, Merino, Rice — Saka, Trossard, Martinelli.

Injured: Calafiori (knee), Gabriel (hamstring), Tomiyasu (knee), Jesus (knee), Jorginho (chest).
Suspended: Partey.

Luis Enrique has a clean bill of health but might have been given pause for thought by his team's efforts against Nice.

The big decision revolves around who will join Ousmane Dembele and Khvicha Kvaratskhelia in the forward line. 

Desire Doue produced a spectacular performance in the first leg of the quarterfinal against Aston Villa which has earned him another start here over Bradley Barcola who has been equally spectacular this season.

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PSG starting lineup (4-3-3, right to left): Donnarumma (GK) — Hakimi, Marquinhos, Pacho, Mendes — F. Ruiz, Vitinha, Neves — Doue, Dembele, Kvaratskhelia.

Injured: None.
Suspended: None.

Here's how to watch this Champions League semifinal, first leg across selected areas of the world's major regions: