| 2024-04-06 | UFC Fight Night: Allen vs. Curtis 2 | Lightweight | Ignacio Bahamondes def. Christos Giagos | KO (head kick) | 1 | 3:34 |
| 2023-09-16 | UFC Fight Night: Grasso vs. Shevchenko 2 | Lightweight | Daniel Zellhuber def. Christos Giagos | Submission (anaconda choke) | 2 | 3:26 |
| 2023-04-22 | UFC Fight Night: Pavlovich vs. Blaydes | Lightweight | Christos Giagos def. Ricky Glenn | KO (punch) | 1 | 1:35 |
| 2022-06-25 | UFC on ESPN: Tsarukyan vs. Gamrot | Lightweight | Thiago Moisés def. Christos Giagos | Submission (rear-naked choke) | 1 | 3:05 |
| 2021-09-18 | UFC Fight Night: Smith vs. Spann | Lightweight | Arman Tsarukyan def. Christos Giagos | TKO (punches) | 1 | 2:09 |
| 2021-05-15 | UFC 262: Oliveira vs. Chandler | Lightweight | Christos Giagos def. Sean Soriano | Technical Submission (brabo choke) | 2 | 0:59 |
| 2020-12-19 | UFC Fight Night: Thompson vs. Neal | Catchweight | Christos Giagos def. Carlton Minus | Decision (unanimous) (30–26, 29–27, 29–28) | 3 | 5:00 |
| 2019-08-17 | UFC 241: Cormier vs. Miocic 2 | Lightweight | Drakkar Klose def. Christos Giagos | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2019-06-01 | UFC Fight Night: Gustafsson vs. Smith | Lightweight | Christos Giagos def. Damir Hadžović | Decision (unanimous) (29–27, 29–27, 29–28) | 3 | 5:00 |
| 2018-12-02 | UFC Fight Night: dos Santos vs. Tuivasa | Lightweight | Christos Giagos def. Mizuto Hirota | Decision (unanimous) (29–28, 29–27, 30–28) | 3 | 5:00 |
| 2018-09-22 | UFC Fight Night: Santos vs. Anders | Lightweight | Charles Oliveira def. Christos Giagos | Submission (rear-naked choke) | 2 | 3:22 |
| 2015-06-06 | UFC Fight Night: Boetsch vs. Henderson | Lightweight | Chris Wade def. Christos Giagos | Decision (unanimous) (29–28, 29–28, 30–27) | 3 | 5:00 |
| 2015-03-21 | UFC Fight Night: Maia vs. LaFlare | Lightweight | Christos Giagos def. Jorge de Oliveira | Submission (rear-naked choke) | 1 | 3:12 |
| 2014-10-25 | UFC 179: Aldo vs. Mendes 2 | Lightweight | Gilbert Burns def. Christos Giagos | Submission (armbar) | 1 | 4:57 |