Yann Sommer (born 17 December 1988) is a Swiss professional footballer who plays as a goalkeeper for Serie A club Inter Milan.

Sommer completed his apprenticeship at Basel, where he won the Swiss Super League on four consecutive occasions, before transferring to Borussia Mönchengladbach in 2014, where he remained for nine years.

Born in Morges, Vaud, Sommer played as a child in the youth teams of Herrliberg and later of Concordia Basel.

During the summer of 2007, Sommer signed a new contract lasting until 2011, and was loaned out to Liechtensteiner club Vaduz to gain first-team experience in an environment somewhat more competitive than the reserves in the Swiss 1.

[2] Sommer made his Super League debut for Basel in a 3–2 defeat to Young Boys at the Stade de Suisse, Wankdorf, on 7 February 2009.

In March 2011, Basel announced it would not offer Costanzo a contract extension, therefore making Sommer the club's first-choice goalkeeper.

[19] He was famously lobbed from long range by teammate Christoph Kramer against Borussia Dortmund in a 1–0 defeat, but Gladbach went on to secure qualification for the UEFA Champions League with one match remaining.

[22] The 2015–16 season began poorly: Gladbach lost its opening match 4–0 to Borussia Dortmund, with Sommer being blamed for the first goal.

[29] Sommer was forced to sit out against VfL Wolfsburg due to a broken nose, having injured it against Manchester City in the Champions League.

[34] In December 2022, Bayern's longtime keeper Manuel Neuer suffered a lower leg fracture during a ski trip and was out until the end of the season, necessitating the signing of a replacement.

[35] On 19 January 2023, Sommer left Gladbach, having spent eight and a half years playing for Die Fohlen, and joined Bayern Munich on a contract until July 2025.

[42] Sommer was the starting goalkeeper for Inter Milan the entire season, as the team won the Italian League title for a landmark 20th time in their history.

He was goalkeeper and captain of the Swiss U-21 team which competed in the final tournament of the 2011 UEFA European Under-21 Championship, hosted by Denmark between 11 and 25 June 2011.

The Swiss team reached the 2011 UEFA European Under-21 Championship Final on 25 June without conceding a goal,[46] but lost 2–0 to Spain.

Sommer made his debut for the Switzerland senior side on 30 May 2012 at the Swissporarena, Lucerne, in a 0–1 defeat against Romania in a friendly match.

On 13 May, he was named in Switzerland's 23-man squad for the 2014 World Cup in Brazil,[47] where he served as back-up goalkeeper to Diego Benaglio.

[48] Alongside Bundesliga colleagues Roman Bürki and Marwin Hitz, Sommer was one of three goalkeepers included in Switzerland's UEFA Euro 2016 squad.

[55][56] On 2 July 2021, he made eight saves in extra time alone against Spain in the Euro 2020 quarter-finals; however, Switzerland lost 1–3 on penalties, after a 1–1 draw.