Fisher-Black started the 2021 season off by defending his National Under-23 time trial title. If the elite and Under-23 results were combined Fisher-Black would've won by 9 seconds.[6] After a crash in Le Samyn ruled him out of contention he set his sights on the Istrian Spring Trophy. Finn started strong with a 6th in the prologue and a 3rd in stage 2 however when it came to the last stage Fisher-Black was 1 second behind in the overall. His team worked hard and Fisher-Black gained enough bonus seconds at an intermediate sprint to gain the virtual lead. With his team controlling the rest if the stage Fisher-Black managed to win overall.[7][8] In the 2021 Tour of Belgium Fisher-Black managed a 3rd in the Stage 3 time trial 18 seconds behind winner Remco Evenepoel he then held his fourth place in the Overall classification till the end of the race.[9]
Fisher-Black claimed his first professional victory by winning the opening stage of the Giro di Sicilia in April 2023. He said of the victory: “My job was to pull into the bottom of the climb, but I looked back at one point and no one was there and the DS on the radio just told me to go as hard as I could...I didn't believe I could win until I saw the line...I kept looking back, and I could see the group just behind me. It was only 100m before the line when I realised I'd get there before them. It wasn't the plan, I'm still in shock”.[11] He won the best young rider jersey in the same race after coming in eighth place on the final stage.[12][13]
In September 2023, Fisher-Black finished second on stage 16 of the Vuelta a Espana, 43 seconds behind Jonas Vingegaard. Fisher-Black said of the result: “When Jonas attacked my idea was to go to the front and push the group on...When I looked back the group wasn't there so the DS [directeur sportif] told me to push and try and catch. It's a nice personal result for me, but the main goal over the next days is to help the guys for the GC.”[14]
