Before finishing his career in December 1965 orthodox boxer Sarens built up a record of 25 wins, 4 draws, and 9 losses, starting at age 23 on October 1960 and ending 5 years later at . Sarens's longest KO streak is 4 fights long out of his 38 pro career fights.
It didn't take Sarens long to get accustomed to the pro style of fighting. Becoming the first person to go the distance with Valere Mahau in a successful pro debut. Sarens continued his mostly successful career with numerous fights following his debut against boxers including Bob Stevens, Abdelkader Ben buker and Michel Francois. Fights included fighting 3 times in 1960 and 7 times in 1962.
On November 4th, 1961, Sarens took on and was defeated by Mario Altana meaning his career tally went to 11-1-1. Sarens's technical boxing ability was put to the test as he got outpointed in the 8 round fight against the better man. Altana gave Sarens his first professional loss of his 13 fight career to date. 7 wins followed where Sarens went on to be the 10th person to stop Michel Francois, 2nd person to stop Serge Breuillier and 30th person to defeat Abdelkader Ben buker.
Taking a knock to his career, Sarens fought and was defeated by Jackie Cailleau on October 8th, 1962 taking his record to 18-2-1. Sarens faced the first stoppage of his career against Jackie Cailleau in the 9th round of a 10 round fight via KO. Sarens continued his success in the next 6 fights taking his record to 22 wins, 2 losses and 3 draws.
Sugar ray Robinson was next in line for Sarens where unfortunately, he was defeated on November 16th, 1963 taking his record to 22-3-3. Sarens's fight against Sugar ray Robinson was Sarens's 2nd stoppage defeat which came via KO in the 8th round of the fight. Fight against followed taking his record to 22-3-4.
Sarens lost to Bo Hogberg in his next fight. Taking place on March 13th, 1964, Sarens's career record after this fight stood at 22-4-4. Sarens was beaten by Bo Hogberg in the 7th round. Sarens had only ever been stopped 3 times previously in his career.
Pascal Di benedetto was next in line for Sarens where unfortunately, he was defeated on June 4th, 1965 taking his record to 25-7-4. Outclassed, Sarens took another loss as the judges awarded Di benedetto the PTS win on a great performance.
Sarens went into his next fight against Pierre Minier on December 6th, 1965 with a career record of 25 wins. It took 38 pro fights for Sarens to decide it was now too much to continue fighting. Sarens's 8 round defeat to Minier was Sarens's final fight as a pro.