[2] Krstičić began his career at OFK Beograd and joined Sampdoria on 1 September 2008 at the insisting of Giuseppe Marotta, who believed the 17-year-old was one of the most talented players he had ever brought to the club.

[4] Luckily, Sampdoria's medical staff was able to reverse the cancer growth[3] and Krstičić lived on to play football, although the condition was a great setback in his career.

[11] Fellow countryman Aleksandar Katai, who also suffered from a serious illness earlier in his career,[12] joined Alavés later the same summer, and the two became midfield teammates.

[19] On 23 January 2019, he scored his first goal for his new club in an emphatic 5–0 home win against AO Chania Kissamikos for the Greek Cup round of 16.

[20] On 3 April 2019, by lashing the ball across from the right wing, Victor Klonaridis picked out the onrushing Krstičić, who prodded it past the beaten Nikos Melissas in a 2–0 Greek Cup semifinal 1st leg against Lamia.

[21] On 2 February 2020, AEK Athens escaped from Peristeri Stadium with all three points thanks to Nenad Krstičić header, whose solitary goal gave Massimo Carrera’s side a narrow 1–0 win over Atromitos.