Berton teamed up with Ondřej Hotárek to compete in pair skating in early 2009. They won the silver medal at 2010 Italian Nationals and were selected to compete at the World Championships. They placed 11th in their debut at the event.
During the 2010–11 season, Berton/Hotárek won silver at the Nebelhorn Trophy and also debuted on the Grand Prix circuit, finishing sixth at Cup of Russia. They won their first Italian national title and were sent to the 2011 European Championships. They placed fourth in the short program and fifth in the free program, setting personal bests in both, and finished fifth overall with their best combined total to date, 164.83 points.
Berton/Hotárek began the 2011–12 season at the 2011 Ondrej Nepela Memorial, where they won the silver medal. In the Grand Prix season, they placed 4th at 2011 NHK Trophy and then won bronze at 2011 Rostelecom Cup, making them the first Italian pair to medal on the Grand Prix circuit. At the 2012 European Championships, they placed 4th, historically the highest Italian result in pairs.
Berton/Hotárek started the 2013–14 Grand Prix season at the 2013 Skate America and finished 5th. They won their first GP title at the 2013 Skate Canada and then finished 4th at the 2014 European Championships, behind Vera Bazarova / Yuri Larionov. Berton/Hotárek finished 11th in the pairs event at the 2014 Winter Olympics in Sochi, Russia.
For the 2014-15 season, Berton/Hotarek were assigned to 2014 Skate America and the 2014 Rostelecom Cup. On 2 July 2014, La Gazzetta dello Sport reported that their partnership had ended. In August 2014, Berton said she had not wanted to split from Hotarek and that she was searching for a partner to continue her competitive career.
