Having started off in the pro game in January 2009 and having built a perfect unbeaten record of 21-0-0, Ronert (age 26) now looks to move into the later stages of his career and step up against some of the top prospects in the division. Ronert's longest KO streak is 8 fights long out of his 21 career fights.
Getting rid of his debut fight nerves early, Ronert took on Andreas Koldorfer in January 2009 and claimed a stoppage victory (round 3, TKO). Ronert was the first person to have ever stopped Koldorfer. Ronert rise in boxing continued with 11 wins against fighters such as Ruslans Pojonisevs, Toni Thes and Remo Arns.
Remo Arns was beaten next on November 12th, 2011 meaning Ronert could maintain his unbeaten streak. Showing his class against Arns, Ronert was the 6th person to go the distance with this opponent. Taking his record to 11-0-0. Ronert then went on to win his next fight against Armen Azizian.
Keeping his losses at zero, Ronert fought on May 26th, 2012 beating Aliaksei Marchenka. Ronert was the first person to stop Aliaksei Marchenka and he did it in the 1st round via KO. Another win followed for Ronert taking his win tally to 13 wins.
Tamas Bajzath was beaten next on November 16th, 2012 meaning Ronert could maintain his unbeaten streak. In 2012 Ronert fought his next opponent Tamas Bajzath and defeated him via UD. Ronert was the 3rd person to go the distance with Bajzath. Ronert then went on to win a further 3 fights taking his record to 17 wins, 0 losses and 0 draws.
On June 28th, 2013 Ronert fought and beat Gogita Gorgiladze (13-1-0) to continue his unbeaten streak. Gogita Gorgiladze was Ronert's next opponent of his career in 2013. The fight was scheduled for 10 and Ronert was the 4th person to go the distance with Gorgiladze. Taking his record to 19-0-0. Ronert then went on to win his next fight against Senol Celikdal.
Shefat Isufi was up next for Ronert on March 1st, 2014. Ronert continued with his winning streak by beating Isufi. In what was a true showing of Ronert's technical ability, Ronert got the decision in the 10 round fight, and became the first person to beat Isufi.
Ensuring he remained unbeaten, Dennis Ronert defeated Remo Arns on May 17th, 2014 in his most recent fight. Ronert became only the 12th person to defeat Remo Arns in his 16 long fight career, taking his win tally to 21 via the judges decision (UD, round 6).