Semerikow started in Obihiro for the first time in the World Cup in November 2014 and finished in 13th place in the mass start, 11th place over 5000 m and third place in the team pursuit. At the individual distance world championships 2015 in Heerenveen he achieved the 23rd place in the mass start and fourth place in the team pursuit and at the individual distance world championships in 2016 in Kolomna the 24th place in the mass start. The following year he ran at the 2017 World Single Distance Championships in Gangwon to 24th place in the mass start, 18th place over 5000 m and tenth place over 10,000 m. In the 2017/18 season he finished in the top ten four times in World Cup singles. He achieved third place in the mass start in Minsk and at the end of the season he reached tenth place in the 5000/10000 m World Cup and sixth place in the mass start World Cup. At the 2018 European Championships in Kolomna, he won the silver medal in the team pursuit. He was also there tenth in the mass start and fourth in the 5000 m. At the beginning of the 2018/19 season he won his first World Cup victory in the team pursuit in Obihiro. This was followed by third places at the World Cup in Tomaszów Mazowiecki in the team pursuit and over 10,000 m and in Heerenveen another victory over 5000 m. At the individual distance world championships in 2019 in Inzell he won over 10,000 m and the bronze medal in the team pursuit and also achieved eighth place over 5000 m and seventh place in the mass start. In early March 2019, he finished eighth at the All-Around World Championship in Calgary . He finished the season in sixth place in the overall World Cup over 5000 / 10,000 m
At Russian championships, Semerikow won the 5000 m and 10,000 m in 2017 and in the mass start in 2019.
Personal bests
500 m 37.30 sec. (installed on December 28, 2018 in Kolomna)
1000 m 1: 16.44 min. (installed on November 8, 2013 in Chelyabinsk)
1500 m 1: 47.96 min. (installed on March 3, 2019 in Calgary)
3000 m 3: 42.61 min. (set up on March 3, 2018 in Inzell)
5000 m 6: 08.96 min. (installed on December 16, 2018 in Heerenveen)
10000 m 12: 57.40 min. (set up on February 9, 2019 in Inzell)