| 2025-11-22 | UFC Fight Night: Tsarukyan vs. Hooker | Welterweight | Nicolas Dalby def. Saygid Izagakhmaev | Decision (split) (29–28, 28–29, 29–28) | 3 | 5:00 |
| 2025-04-26 | UFC on ESPN: Machado Garry vs. Prates | Welterweight | Randy Brown def. Nicolas Dalby | KO (punch) | 2 | 1:39 |
| 2024-06-22 | UFC on ABC: Whittaker vs. Aliskerov | Welterweight | Rinat Fakhretdinov def. Nicolas Dalby | Decision (split) (29–28, 28–29, 29–28) | 3 | 5:00 |
| 2023-11-04 | UFC Fight Night: Almeida vs. Lewis | Welterweight | Nicolas Dalby def. Gabriel Bonfim | TKO (knees and punches) | 2 | 4:33 |
| 2023-06-17 | UFC on ESPN: Vettori vs. Cannonier | Welterweight | Nicolas Dalby def. Muslim Salikhov | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2023-01-21 | UFC 283: Teixeira vs. Hill | Welterweight | Nicolas Dalby def. Warlley Alves | Decision (split) (29–28, 28–29, 29–28) | 3 | 5:00 |
| 2022-07-23 | UFC Fight Night: Blaydes vs. Aspinall | Welterweight | Nicolas Dalby def. Cláudio Silva | Decision (unanimous) (29–28, 29–28, 29–27) | 3 | 5:00 |
| 2021-06-26 | UFC Fight Night: Gane vs. Volkov | Welterweight | Tim Means def. Nicolas Dalby | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2020-11-21 | UFC 255: Figueiredo vs. Perez | Welterweight | Nicolas Dalby def. Daniel Rodriguez | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2020-07-26 | UFC on ESPN: Whittaker vs. Till | Welterweight | Jesse Ronson vs. Nicolas Dalby | No Contest (overturned) | 1 | 2:48 |
| 2019-09-28 | UFC Fight Night: Hermansson vs. Cannonier | Welterweight | Nicolas Dalby def. Alex Oliveira | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2016-09-03 | UFC Fight Night: Arlovski vs. Barnett | Welterweight | Peter Sobotta def. Nicolas Dalby | Decision (unanimous) (30–26, 30–26, 30–26) | 3 | 5:00 |
| 2016-04-10 | UFC Fight Night: Rothwell vs. dos Santos | Welterweight | Zak Cummings def. Nicolas Dalby | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2015-10-24 | UFC Fight Night: Holohan vs. Smolka | Welterweight | Darren Till vs. Nicolas Dalby | Draw (majority) (29–28, 28–28, 28–28) | 3 | 5:00 |
| 2015-05-30 | UFC Fight Night: Condit vs. Alves | Welterweight | Nicolas Dalby def. Elizeu Zaleski dos Santos | Decision (split) (29–28, 28–29, 29–28) | 3 | 5:00 |