Isaac Doederlein and Samir Chantre met 5 times on record, and Doederlein holds a 4 to 1 edge. All 5 matches were contested in the gi, and their meetings ran across a tight window from 2017 to 2019, including stops at 2017 ACB Jiu Jitsu Grand Prix, the 2018 IBJJF Pan Championship, the 2018 IBJJF San Francisco International Open, and the 2019 Abu Dhabi King of Mats, Lightweight.

Doederlein won three of his four by points or on the mat, taking two semi-final decisions on points in 2017 and a points win at Abu Dhabi in 2019. The one finish in the series came in the 2018 San Francisco final, where Doederlein closed with an Armbar. Chantre's lone win came earlier in 2018 at the Pan, taken by decision in the round of 16.

The styles line up with the records. Doederlein wins 68% of his recorded matches and finishes 53% of those wins, with his most frequent finish being the Gi Choke From Back at 13 wins. Chantre wins 61% of his recorded matches with a lower finish rate of 40%, and his most frequent finish is the Toe Hold at 9 wins. Across this rivalry the difference was Doederlein's ability to control positions and score, with the decisions and points wins carrying most of the series.