GROMDA

GROMDA 26: Heavy Heart CHOKED the champion! Don Diego won by disqualification

Jakub

Published: 05 September 2026

In the main event of GROMDA 26, all eyes were on the 4×4 championship ring. Mateusz “Don Diego” Kubiszyn once again put his title on the line, and this time the extremely dangerous “Heavy Heart” tried to take it from him.

Over the years, Kubiszyn has earned a reputation as GROMDY’s undisputed dominant force. One challenger after another has tried to find a way to beat the champion, but none has managed to dethrone him. “Don Diego” has proven time and time again that his combination of vast experience, a tough chin, and boxing skills makes him an exceptionally difficult puzzle to solve. At GROMDA 26, however, he once again found himself facing a fighter who had no intention of showing the champion any respect.

“Heavy Heart” earned his shot with impressive performances in the distinctive 4×4 ring. The German quickly showed that, in addition to his sharp tongue and immense self-confidence, he also has what it takes in the ring. Victories over successive opponents propelled him to the very top of the contender ladder. At GROMDA 26, the time had come for the ultimate test—“Heavy Heart” faced the undefeated “Don Diego,” with a clear goal in mind: to end Kubiszyn’s reign and take the championship belt back to Berlin.

GROMDA 26: Don Diego vs. Heavy Heart—Who Won? Match Report

Round 1 – Don Diego got right into the fight, landing jabs to Heavy Heart’s head and torso. The challenger ducked behind his guard and kept his hands high. Don Diego landed a right hook on the counter, after which he staggered. Heavy Heart threatened with that punch again and looked to launch his own offensive. He eagerly provoked Kubiszyn, who didn’t want to burn through his energy in the very first round. Heavy Heart went on the attack at close range but lacked accuracy. Heavy Heart landed two more blows on the champion before the round ended.

Round 2 – Don Diego threatened the challenger with a left jab. Heavy Heart also tried to go on the offensive, but focused on defense and counterattacks. Kubiszyn was in a bit of trouble, as the Cameroonian threatened him with powerful hooks. Don Diego dropped low with a right to the torso, then the GROMDY champion went for Heavy Heart’s head. The challenger kept his hands up high, but took a hard left from the champion!

Round 3 — Heavy Heart began to react more quickly to Don Diego’s moves. He threatened with jabs, taking advantage of his long reach. He landed a punch on the champion’s jaw, but the champion didn’t stop asserting his dominance. Don Diego let the challenger’s next move pass, and the challenger, in turn, stood in the corner and taunted the champion. Don Diego had no intention of playing into his opponent’s game; he skillfully dodged Heavy Heart’s subsequent attacks.

Round 4 – Heavy Heart backed up against the ropes and defended himself against Don Diego’s attacks, which were breaking through his guard. Meanwhile, the GROMDY champion tested the challenger’s reactions, while the challenger remained alert and looked for counterattacks. Heavy Heart threw a powerful right, but Don Diego dodged it. Don Diego, however, landed a superb uppercut and began to gain the upper hand, which he emphasized with a strong and clean right.

Round 5 – Heavy Heart started the no-limit round with a wild swing that missed. Don Diego easily dodged it and landed low blows on the challenger. Heavy Heart, seemingly enraged, launched a flurry of jabs… only to immediately retreat behind a double guard. A brilliant move by Don Diego, who shifted into second gear and landed a blow on the challenger. The Cameroonian was going for the champion’s head, but his repeated shots to Kubiszyn’s midsection worked against him. Left to left—though both were accurate, Don Diego’s looked better.

The bloodied GROMDY champion kept pressing Heavy Heart. He’d close in with three powerful punches and immediately step back to avoid a possible counterattack. Don Diego caught up to the challenger in the center of the ring and landed a right hook. Heavy Heart circled, looking for a left jab. The champion, however, dominated and was heading toward victory. The referee stepped into the clinch and stopped the fight, and Heavy Heart fouled the Pole.

Faced with Heavy Heart’s dangerous jabs, Don Diego got fired up and closed the distance with a flurry of heavy hooks. The challenger didn’t back down; he stood his ground and tried to strike back. Heavy Heart took control and landed effective jabs. Kubiszyn’s face was getting bloodier and bloodier; Heavy Heart closed the distance, only to be met with a lightning-fast, short flurry from the champion! Don Diego was picking up the pace with increasing enthusiasm, while Heavy Heart looked for a guillotine choke in the clinch.

Another successful move by Don Diego! A powerful right hand landed on Heavy Heart, who had been threatening the champion with counterattacks, but there’s no denying that things were starting to go south. Heavy Heart was fouling more and more often and resorting to dirty tactics. Don Diego was running out of steam, though the Cameroonian also had his moments of weakness. Heavy Heart landed a punch to the stomach on a counter, but Kubiszyn immediately followed up with more! Don Diego began landing punches, targeting Heavy Heart’s head as he started to leave openings, but he didn’t have much strength left.

Heavy Heart’s face was showing more and more injuries, but he kept urging the champion to keep attacking. Don Diego continued to pick apart the Cameroonian, landing a straight right. A helpless Heavy Heart knocked the GROMDY champion down against the ropes and landed another MMA-style strike. Enraged, Don Diego countered with an uppercut, and moments later showered the challenger with blows. Heavy Heart threw hooks, but Kubiszyn easily dodged them! Smiling, he unleashed another flurry of strikes, sapping the challenger’s will to fight.

Heavy Heart had already focused almost exclusively on the straight punch coming from Don Diego, who, in turn, had no major trouble reading the Cameroonian’s moves and counterattacks. Don Diego’s brilliant evasion culminated in another attempt at a tight guillotine choke, prompting the referee to stop the fight.

Result: Don Diego won by disqualification in the 5th round.