At last, Pomerleau gets an opponent who can truly test him. Derek opened the tournament against Ustyan Liparit, a tough fight that ultimately exposed the Ukrainian’s lack of experience. In his second bout, Pomerleau was trailing against Paul Ryan, but his power bailed him out. His third opponent, Ukrainian Rybalko, was stylistically favorable — making the task easier for the Canadian.

Now, however, he faces a genuinely intriguing challenge.

Colombian Sinisterra is a tall, durable, and heavy-handed fighter with real knockout power. He’s a bit slow and sometimes overthinks his moves, but he represents a legitimate threat to Pomerleau — the kind of opponent who can absorb his shots and try to outmuscle and outlast him through sheer strength and endurance.

The fighters are close in age — Sinisterra is 24, Pomerleau is 25 — but Derek is clearly ahead in terms of experience and standing. The Canadian ranks 16th in the world among middleweights, while the Colombian sits at No. 64.

Pomerleau is an economical boxer — that was one of the reasons he was behind against Ryan before the stoppage. He throws roughly half as many punches as Sinisterra, relying instead on precise, high-impact shots.

Sinisterra isn’t the most aggressive fighter either — he often works as a counterpuncher but, once he seizes the initiative, overwhelms opponents with combinations. Pomerleau, by contrast, aims for one clean connection followed by a clinical finish.

They share the same goal — but take different routes to reach it.

Both maintain an excellent pace for their age group. The short breaks between fights haven’t affected their recovery — each enters the ring in great physical condition. That’s crucial given their punching power: freshness and fitness could directly determine the outcome.

Statistically, they’re almost identical — Sinisterra has stopped 77% of his opponents, Pomerleau 79%.

The difference lies in how they achieve their knockouts. The Colombian relies on size and strength, breaking down opponents with sustained pressure and heavy punches. That was evident in his last fight against Barico — after a rough start, he wore his rival down and took over.

Pomerleau is a different kind of puncher — a classic precision finisher. He waits, lands clean, and closes the show.

Neither fighter has yet faced a true endurance test. Sinisterra’s only career loss came by decision, and he absorbed serious punishment against Barico without folding.

Pomerleau, on the other hand, rarely gets hit clean. His defensive reflexes are sharp — he makes rivals miss and immediately counters their mistakes.

Once again, the fight takes place in Riyadh. The previous events there were comfortable for both fighters — fair judging, smooth scheduling — and nothing suggests that will change.

Pomerleau must now prove his status as a tournament favorite. He’s scored two stoppage wins in three fights and sits high in the global rankings.

Facing a strong, durable, and patient opponent like Sinisterra is the perfect test.

From a pure boxing standpoint, the Canadian has all the tools to win. Now he must back that up — not on paper, but in the ring.