Škriniar has been described as a defender who is “a strong tackler who is quick to make clearances”. A natural centre-back, he can also be deployed as a defensive midfielder where he also produced outstanding performances with under-21 side. His former youth manager said of him: He has always been the leader on and off the pitch. He has been described in the media as the successor to former Liverpool icon Martin Škrtel in Slovakia’s defensive line. He has also drawn praise from several Italian pundits for his positional sense, as well as his ability in the air, and in one on one situations. When linked with a transfer to PSG in June 2022, L’Équipe highlighted Škriniar’s high pass and long pass accuracy, his complexity and low injury proneness and imposing figure. On 7 July 2017, Škriniar completed a transfer to fellow Serie A side Inter Milan signing a five-year contract. The club paid a reported fee around €20 million and also included the striker Gianluca Caprari. The transfer made Škriniar the most expensive Slovak player of all time. He was presented four days later and received squad number 37, stating: “It’s amazing to think that in 18 months I’ve gone from the Slovakian league to playing for a club like Inter.” Škriniar made his competitive debut for the club on 20 August in the opening matchday of 2017–18 Serie A versus Fiorentina as Inter won 3–0 at San Siro. He scored his first Serie A goal later on 16 September against Crotone, the opener in the 82nd minute with a right-footed shot in an eventual 2–0 away win to keep Inter’s winning streak. His second of the campaign came in matchday 10 against his former side Sampdoria on 24 October, netting again the opener as Inter won 3–2. Škriniar was distinguished for his performances in the first part of the season, being one of the best players of the squad. He continued with his great performances even in the second part of the season, which proved clinical for the team, which returned to UEFA Champions League after six years. He concluded the season by playing in all 38 matches in league, receiving only two yellow cards. In the 2018–19 season, Škriniar made his debut in the UEFA Champions League on 18 September in the opening group stage match against Tottenham Hotspur, playing full-90 minutes in a 2–1 comeback win at San Siro. On 2 November 2019, in a Serie A match against Bologna which ended in a 2–1 away win, Škriniar made his 100th appearance in all competitions for Inter, all of them as starter. On 3 November 2021, Škriniar scored his first UEFA Champions League goal in a 3–1 away win against Sheriff Tiraspol.