2014–2015 At the
2014 Summer Youth Olympics, in
Nanjing,
China in August 2014, Sabbioni won a gold medal in the
100 metre backstroke along with
Evgeny Rylov of
Russia as they both swam the exact same time of 54.24 seconds in the final. On 14 April 2015, at the year's Italian Spring National Championships in
Riccione, he broke the
national record in the
long course 100 metre backstroke with his time of 53.49, which lowered the record over two tenths of a seconds from the prior record of 53.77 seconds set in 2009 by
Mirco Di Tora.
2015 European Short Course Championships In early December, at the
2015 European Short Course Swimming Championships in
Netanya,
Israel, Sabbioni set Italian national records in all three distances of the
short course backstroke events, including two records in the 50 metre backstroke of 23.23 seconds in the semifinals and 23.09 seconds in the final, a record of 50.57 seconds in the 100 metre backstroke, and a record of 1:50.75 in the 200 metre backstroke. He also helped set an Italian record at 1:31.71 in the 4×50 metre medley relay.
2016–2017 In April 2016, at the Italian Spring National Championships for the year in Riccione, Sabbioni broke his former national record of 53.37 seconds in the 100 metre backstroke with his new time of 53.34 seconds.
2017 Winter National Championships At the
short course 2017 Italian Winter National Championships in early December, Sabbioni lowered his Italian records in the 100 metre backstroke, from a 50.57 to a 49.96, and the 50 metre backstroke, from a 23.09 to a 23.06.
2017 European Short Course Championships Later in December, at the
2017 European Short Course Swimming Championships in
Copenhagen,
Denmark, Sabbioni broke his own national record in the 100 metre backstroke again, lowering the mark to 49.68 seconds and winning the silver medal in the event. For the 50 metre backstroke, Sabbioni lowered his national record of 23.06 from earlier in the month by one hundredth of a second to 23.05 in the final, winning the
gold medal in the event and finishing two hundredths of a second ahead of
Kliment Kolesnikov of Russia who won the silver medal. Speaking to
LEN about the race, Sabbioni said, "Before the race I got really angry. This is the feeling you need to win the 50m. It gives you the power, the strength, the speed. I felt my legs after the turns but anger took over again and it lifted my spirit enough to win this race."
2019 World Championships At the
2019 World Aquatics Championships in
Gwangju,
South Korea in July 2019, Sabbioni competed in the
50 metre backstroke,
100 metre backstroke,
mixed 4×100 metre medley relay, and
4×100 metre medley relay. Sabbioni was one of two swimmers, the other being
Dylan Carter of
Trinidad and Tobago, to have wedge equipment malfunction during his backstroke start in the 100 metre backstroke, and the only swimmer to have the technology fail a second time after officials assured him nothing would happen, this story was picked up and covered by newspapers
The Seattle Times and
The Korea Herald. As officials ruled it was equipment failure on the wedge malfunction each time, Sabbioni was allowed to re-race the event until the equipment worked, at which point he swam a 53.85 for his time in the prelims heats and advanced to the semifinals.
2021 European Short Course Championships Sabbioni was one of a total of 40 swimmers named to the Italian team in October 2021 to compete at the
2021 European Short Course Swimming Championships held in November at the
Kazan Aquatics Palace located in
Kazan,
Russia. He went for depth with his events for the Championships, entering to compete in all available distances in backstroke, the 50 metre backstroke, 100 metre backstroke, and 200 metre backstroke. On the first day of competition, 2 November, he placed third in his prelims heat of the 50 metre backstroke with a time of 23.50 seconds and did not advance to the semifinals. While his time was faster than some of the swimmers who qualified for the semifinals, including
Kristóf Milák of
Hungary in the same prelims heat, only the fastest two Italian swimmers advanced, which did not include Sabbioni. The same day he was officially withdrawn from the 200 metre backstroke, opting not to race the event. In the prelims heats of the 100-metre backstroke on the third day of competition, Sabbioni swam a 51.98 and did not advance to the semifinals.
2022–2023 In November 2022, Sabbioni was banned by
FINA, now
World Aquatics, from their competitions for 20 months (starting 23 March 2022 and continuing through the end of the day on 22 November 2023) after representatives from the
World Anti-Doping Agency had difficulty ascertaining his whereabouts for testing on three occasions, a case similar to
Rūta Meilutytė of
Lithuania from 2019. ==International championships (50 m)==