|Full name||Aleksandar Katai|
|Date of birth||6 February 1991|
|Place of birth||Srbobran, SFR Yugoslavia|
|Height||1.82 m (6 ft 0 in)|
|2009||→ Palić (loan)||10||(3)|
|2011||→ OFI Crete (loan)||2||(0)|
|2011–2013||→ Vojvodina (loan)||31||(6)|
|2013–2014||→ Platanias (loan)||24||(8)|
|2014–2015||→ Red Star Belgrade (loan)||20||(2)|
|2015–2016||Red Star Belgrade||37||(23)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 14:41, 24 May 2017 (UTC).
‡ National team caps and goals correct as of 15 November 2016
Katai started playing football for his hometown club FK Vojvodina youth squad. After 6 months loan to lower league team FK Palić at the start of 2009–10 season he was promoted to Vojvodina's first team. He's debut in Serbian SuperLiga was on 14 March 2010, when he came in as substitute against FK Čukarički, and he scored his first goal just seven days later in a match against FK Mladi Radnik. On 28 June 2011, he left FK Vojvodina and went to Athens to join Olympiacos.
On 24 June 2011, Olympiacos agreed to sign Katai on a four-year contract. At his first trainings with the club, coach Ernesto Valverde told Katai that he did not defend enough and that he needed to improve as a player. Katai did not play a single match for Olympiacos, but was instead sent on loan four times. He was first loaned to OFI Crete, with whom he made his debut on 5 November 2011, against Panionios. The loan spell to Crete was unsuccessful, and so Olympiacos loaned him back to his hometown club FK Vojvodina. While on loan at Vojvodina, in 2012 after one game with Spartak Subotica, he felt very ill and went to the hospital, where he was diagnosed with thrombopenia. He had to have some blood removed and stayed in the hospital for two weeks before he was allowed to recover from home. During his recovery, he had gained over 20 pounds, and did not return to play football until the end of the year. He remained a loaned player for Vojvodina until the club president Ratko Butorović died unexpectedly on 8 June 2013, which led to a period of instability in the club during which Katai left. He subsequently was loaned to Platanias, for whom he scored a total of eight goals and six assists until his loan there expired in the summer of 2014.
Red Star Belgrade
On 31 August 2014, in a last-minute deal before the transfer window closed, Katai devoted to a one-year loan to Red Star Belgrade. Throughout the fall of 2014, Katai was reported to be out of shape, and Red Star's coach Nenad Lalatović was said to have claimed that Katai "had a problem in his head".
On 18 June 2015, it was announced that Katai terminated his contract with Olympiacos and forgave a debt of €300,000 which was owed to him by Red Star from the loan contract, and subsequently signed a two-year contract with Red Star Belgrade. For the 2015–16 season, Miodrag "Grof" Božović was hired as the new coach and Katai played a good game against Kairat in the first qualifying round for the Europa League, although Red Star failed to qualify. By the end of October 2015, Katai had scored 10 goals and made 6 assists in 15 league matches, ranking him one of the most effective midfielders in all of Europe at the time surveyed.
In the first competitive match of the 2016–17 season, Katai scored an equalizer and assist for win against Valletta FC in the first match of the second qualifying round for the Champions League in Valletta and winner in rematch, in Belgrade. In the first game of the third round of qualification for the Champions League against Bulgarian PFC Ludogorets Razgrad continued his goal-scoring series, with a 12th consecutive goal, when he dribbled past three players and scored, though Red Star were ultimately eliminated.
- As of 24 May 2017
|Palić||2009–10 (loan)||League Vojvodina||10||3||—||—||—||10||3|
|OFI Crete||2011–12 (loan)||Superleague||2||0||—||—||—||2||0|
|Red Star Belgrade||2014–15 (loan)||SuperLiga||20||2||2||0||—||—||22||2|
- As of 15 November 2016
- Red Star
- "Aleksandar Katai". srbijafudbal.net (in Serbian). Retrieved 22 February 2013.
-  Sportal: Srbin doputovao u Grčku (in Serbian) 28 June 101
- ""Έκλεισε" τον Κατάι, συμφώνησε με Βοϊβοντίνα". redplanet.gr. 2011-06-24. Archived from the original on 2011-06-26.
- "Mozzart Sport: Katai za MOZZART otkrio da je nekoliko meseci vodio bitku sa zdravljem: Bio sam nenormalno "plav" i lekari su utvrdili da bolujem od trombocitopenije" (in Serbian). 13 March 2015.
- Aleksandar Katai finally made his debut (Serbian) - 8 November 2011
-  Novosti: Katai prvi otišao iz Vojvodine (in Serbian) 11 June 2013
- "Mozzart Sport: Lalatović: Katai ima problem u glavi, Partizanu je pomogla gej parada" (in Serbian). 7 October 2014.
-  Mozzart Sport: ZVANIČNO: Katai u Zvezdi! (in Serbian) 31 August 2014
-  RTS: Katai ostaje u Zvezdi, potpisao ugovor na dve godine! (in Serbian) 26 June 2013
-  S. Ilijoski. Novosti: “Desetka” Zvezde među najproduktivnijim igračima u Evropi: Katai u društvu velikana (in Serbian) 30 October 2015.
- Malteški vitez Aleksandar Katai! (in Serbian). Retrieved 12 July 2016.
- On je Katai, on je Magiko! (in Serbian). Retrieved 27 July 2016.
- "Aleksandar Katai, calidad y gol para redondear el ataque albiazul" [Aleksandar Katai, quality and goal to round up the white-and-blue attack] (in Spanish). Deportivo Alavés. 31 August 2016. Retrieved 31 August 2016.
-  Mozzart: Zaslužen poziv: Katai u reprezentaciji Srbije za Albaniju i Portugaliju! (in Serbian) 5 October 2015. Retrieved 30 October 2015
- Aleksandar Katai at Soccerway
- "Aleksandar Katai". National Football Teams. Benjamin Strack-Zimmerman.
- Veljko Ivanović. "Blic: Uz moju Teu sve je lakše i lepše!".