Britain's Bianca Walkden said it was "good to be back" after returning to action at the Greek Open.
The 23-year-old was back after six months out following knee surgery and claimed silver in the +73 category.
Walkden, who won her first European title in May 2014, lost to Poland's Aleksandra Kowalczuk in the final.
Meanwhile, former kick boxing world champion Tony Stephenson won his first ever gold medal at the tournament in the -68kg division.
Josh Calland, 16, finished runner-up in the men's -54kg category, while Jade Slavin won a bronze in the women's -73kg.