[10] He made his first-team debut for Forest on 21 April 2014, coming on as a late substitute for the injured Dorus de Vries in a 2–0 win at Leeds United.

[12] A loan to Wrexham fell through in July 2014 after manager Kevin Wilkin was unable to accept an instant recall option demanded by Forest due to regulations by the FAW.

[13] Evtimov instead joined Nottinghamshire League Two club Mansfield Town on 19 August, on loan until 3 January, after impressing manager Paul Cox during pre-season.

[16] He played a total of 11 games for the "Stags", and new manager Adam Murray stated that "we attempted to extend his loan but unfortunately for us, Forest see him as part of their long-term plans".

[20] His loan spell at the Estádio José Arcanjo proved a difficult one as he conceded within three minutes of his debut, in a 3–2 defeat at União da Madeira on 10 September.

[21] Manager Cristiano Bacci lost his job the following month, and though Evtimov established himself in the first-team under new boss Bruno Baltazar, he was recalled from his loan spell earlier than planned on 13 January, having made ten appearances for the "Lions".

[25] On 8 August 2017, Evtimov started Forest's first round EFL Cup tie against Shrewsbury Town, conceding a penalty in a 2–1 win.

[27][28] At fault for at least one of the goals in a 3–0 defeat, The Sentinel's Michael Baggaley wrote that "Evtimov looked as though he had only just been introduced to his defence, but that’s not a criticism because actually he had".

[29] Manager Neil Aspin reserved his criticism for the club's medical staff as they only ruled Roos as unfit to play the previous day.

[30] On 31 August 2018, Evtimov's contract with Nottingham Forest was terminated by mutual consent after he found himself behind Costel Pantilimon, Luke Steele and Jordan Smith in the first-team pecking order.

[43] On 17 July 2020, Evtimov returned to Bulgaria, signing for First League side CSKA Sofia, a club he supported growing up.