Isak with Sweden in 2019
|Date of birth||21 September 1999|
|Place of birth||Solna, Stockholm, Sweden|
|Height||1.90 m (6 ft 3 in)|
|2017–2019||Borussia Dortmund II||12||(5)|
|2019||→ Willem II (loan)||16||(13)|
* Senior club appearances and goals counted for the domestic league only and correct as of 22 September 2019|
‡ National team caps and goals correct as of 13 September 2019
Alexander Isak (Swedish: [alɛkˈsanːdɛr ˈiːsak], Tigrinya: ይስሐቅ ysäḳ; born 21 September 1999) is a Swedish professional footballer who plays as a forward for La Liga club Real Sociedad and the Swedish national team.
Isak was born and raised in Solna, in central Stockholm County, from Eritrean parents. He started playing for the youth team of the largest club in the area, the team he supports, AIK, at age six.
Breakthrough at AIK
Isak made his first team debut for AIK on 28 February 2016, appearing as a substitute in the 75th minute of the Swedish Cup away match against fourth tier side Tenhults IF. At age 16, Isak scored a goal in the 6–0 victory.
On 7 April 2016, AIK head coach Andreas Alm included Isak in the starting lineup on matchday 2 of the Allsvenskan in an away fixture against Östersunds FK, alongside fellow young striker Carlos Strandberg. He secured the victory for his side, scoring the second goal in a 2–0 win, thus becoming the youngest scorer in AIK Allsvenskan history at the age of 16 years and 199 days.
On 3 May 2016, Isak signed his first professional contract through the end of the 2018 season, having impressed in his first few games, and establishing himself as a first team regular. Between matchdays 8 and 9, head coach Alm was sacked, but Isak was confirmed in the lineup by new manager Rikard Norling.
On 21 September 2016, Isak's 17th birthday, he scored two critical goals in AIK's 3–0 derby win over arch-rivals Djurgårdens IF. He was later described by teammate Chinedu Obasi as "Sweden's new Zlatan Ibrahimović".
On 23 January 2017, Isak signed for Bundesliga club Borussia Dortmund on a long-term contract, lasting until the summer of 2022. The transfer fee was undisclosed, but reports suggested that it was set at €9 million, which would be the highest transfer sum ever paid for an Allsvenskan player. Before signing with Dortmund, Isak reportedly turned down a move to Real Madrid.
Isak made his first appearance for the club in a 3–0 cup win over Sportfreunde Lotte on 14 March 2017. Isak won his first medal with the club when Dortmund won the 2016–17 DFB-Pokal, only appearing once in the tournament, and not being in the squad for the final.
Loan to Willem II
After no appearances in the 2018–19 Bundesliga season for Borussia Dortmund, Isak was loaned to Dutch Eredivisie club Willem II. On 28 February 2019, he scored the equalizer and the winning penalty against AZ Alkmaar in the semi-finals of the KNVB Cup, helping Willem II reach the Dutch cup final for the first time since 2005. On 30 March 2019, he became the first player ever to score three penalties in one Eredivisie match, in a 3–2 win against Fortuna Sittard.  On 14 April 2019, Isak became the first foreign-born player in the Eredivisie to score 12 goals in his first 12 league games. The supporters gave him the nickname ‘The Giraffe’.
On 12 June 2019, Isak signed a five-year deal with Real Sociedad joining the La Liga club on 1 July 2019, in which he scored his first goal in his first game. He continued the pre-season in a strong way, scoring four goals in five games. 
Isak was called up to the Sweden national team for the friendly matches against Ivory Coast on 8 January 2017 and Slovakia on 12 January. He made his debut against the Ivory Coast, coming on for Per Frick in the 62nd minute of a 1–2 loss. He started the second game against Slovakia, scoring the first goal in a 6–0 win in the 19th minute, becoming the youngest goalscorer ever in the history of the Sweden national team.
On 23 March 2019, Isak made his first competitive appearance for Sweden, when he replaced Robin Quaison in the 88th minute in a UEFA Euro 2020 qualifying game against Romania, which Sweden won 2–1.
Isak scored his first competitive goal for Sweden on 7 June 2019, when Sweden beat Malta in a UEFA Euro 2020 qualifying game at Friends Arena in Stockholm, Sweden. Isak scored the last goal in a 3-0 win.
|Borussia Dortmund II||2016–17||Regionalliga West||1||0||—||1||0|
|Willem II (loan)||2018–19||Eredivisie||16||13||2||1||—||18||14|
|Real Sociedad||2019–20||La Liga||3||0||0||0||—||3||0|
- As of 5 September 2019
- As of 5 September 2019
- Scores and results list Sweden's goal tally first.
|1.||12 January 2017||Armed Forces Stadium, Abu Dhabi, United Arab Emirates||Slovakia||1–0||6–0||Friendly|
|2.||7 June 2019||Friends Arena, Solna, Sweden||Malta||3–0||3–0||UEFA Euro 2020 qualification|
|3.||5 September 2019||Tórsvøllur, Tórshavn, Faroe Islands||Faroe Islands||1–0||4–0|
- Youngest goalscorer of the Sweden national football team: 17 years, 3 months and 22 days – (one goal in a 6–0 win against Slovakia on 12 January 2017)
- ""Jag blir alltid jämförd med Goitom"" (in Swedish). 2 April 2016. Retrieved 11 June 2016.
- "Supertalangen: "Att få dra på sig AIK-tröjan är drömmen"" (in Swedish). 24 November 2015. Retrieved 11 June 2016.
- "Talangen förlänger tre år med AIK" (in Swedish). 3 May 2016. Retrieved 11 June 2016.
- "Skrev AIK-historia – yngst någonsin" (in Swedish). 7 April 2016. Retrieved 11 June 2016.
- "TV: Supertalangens mål framför PL-scouterna" (in Swedish). 25 April 2016. Retrieved 11 June 2016.
- "AIK-succén direkt i Norlings återkomst" (in Swedish). 16 May 2016. Retrieved 11 June 2016.
- "Alexander Isak hyllas: "Kan bli nya Zlatan..."" (in Swedish). 22 September 2016. Retrieved 22 September 2016.
- "Borussia Dortmund sign striker Alexander Isak". 23 January 2017. Retrieved 14 January 2017.
- "Officiellt: Alexander Isak klar för Borussia Dortmund" (in Swedish). 23 January 2017. Retrieved 14 February 2017.
- "Bomben: Isak nobbar Real – här är hans val" (in Swedish). 21 January 2017. Retrieved 14 February 2017.
- "Här får Isak göra debut i Dortmund". Aftonbladet (in Swedish). Retrieved 26 April 2019.
- "Blir mästare efter hans 40:e fullträff". Aftonbladet (in Swedish). Retrieved 26 April 2019.
- "Willem II huurt spits Alexander Isak" (in Dutch). willem-ii.nl. 25 January 2019.
- "Willem II-aanvaller Isak schrijft Eredivisiehistorie". telegraaf.nl.
- "Alexander Isaks succé – målskytt igen för Willem II". www.expressen.se (in Swedish). Retrieved 16 April 2019.
- "La Real Sociedad ficha a Alexander Isak" (in Spanish). 12 June 2019. Retrieved 12 June 2019.
- "Isak historisk i 6-0-seger mot Slovakien" (in Swedish). 12 January 2017. Retrieved 14 February 2017.
- "TV: Isak med första tävlingsmålet i landslaget när Sverige körde över Malta". fotbollskanalen (in Swedish). Retrieved 8 June 2019.
- "Isak seals points for Sweden".
- "A. ISAK". Soccerway. Retrieved 26 October 2016.
- Alexander Isak at WorldFootball.net
- "Alexander Isak - national football team player". EU-Football.info. Retrieved 23 June 2017.
- "Isak stolt över priset som årets nykomling" (in Swedish). 17 November 2016. Retrieved 14 February 2017.