Early career Sylvestr scored his first
hat-trick in a match against
Tatran Prešov on 4 April 2009.
Erzgebirge Aue In 2012, Sylvestr joined
2. Bundesliga club
Erzgebirge Aue, signing a four-year contract. He scored in a 3–0 win against
FC St. Pauli. His second season with Erzgebirge Aue was his most successful, becoming the joint top goal scorer in the 2. Bundesliga. Several teams in the German top flight were interested in Slovak international in the summer transfer window. Sylvestr eventually decided to join rivals Nürnberg.
1. FC Nürnberg On 3 June 2014, Sylvestr joined 2. Bundesliga club
1. FC Nürnberg, signing a three-year contract. He scored in the home match of the opening round of the 2. Bundesliga against his former club Erzgebirge Aue. His strike from the 69th minute against Erzgebirge was ultimately the winner. Sylvestr was rumored to be leaving at the end of the season, but ultimately decided to stay at Nürnberg for one season.
Later career On 19 February 2017, Sylvestr scored in his league debut for
Danish Superliga club
AaB. In his second match he scored a hat-trick, and was voted
Player of the Month in the league. In December 2017, he left the club. On 20 October 2020, Sylvestr joined
Indian Super League club
Chennaiyin FC on a one-year deal. He appeared with the club in 19 league matches and scored twice as Chennaiyin finished on eighth position. On 9 January 2023, Sylvestr joined Polish
second division side
Resovia.
KFC Komárno 2023–24 season: Promotion to the First Division In February 2024, it was announced that after 14 years abroad, Sylvestr would be returning to Slovakia, this time to
2. Liga club
KFC Komárno. He scored his first goal in a 2–0 win over
MFK Tatran Liptovský Mikuláš in March 2024, scoring in the 10th minute of the game. The goal was Sylvestr’s first in a league match in Slovakia after more than thirteen years. At the end of the season, Komárno would overtake title favorites
Tatran Presov and win the 2. Liga, getting promoted to the
Slovak First Football League.
2024–25 season Sylvestr made his return in the first division in a 4–1 loss against his former club,
Slovan Bratislava, scoring the only goal for his team to equalize the game to 1–1 in the 19th minute. His next goal came in a 3–2 loss to
Spartak Trnava, scoring from a corner and subsequently injuring his nose in the process. Komárno would go on to score again and lead the match 2–1 until goals from Spartak in the 81st and 84th minute would seal the win. Sylvestr assisted the winning goal to
Ondřej Rudzan in a 5–4 win against
MFK Zemplín Michalovce. In his last season with the club he scored four times and assisted four times, helping Komárno avoid relegation with 39 points.
MFK Zvolen In the summer of 2025, Sylvestr joined
2. Liga club
MFK Zvolen. He impressed with his performance in his first four games, being able to score two hat-tricks in a 3–2 win over against
FC Petržalka and a 5–1 over
Baník Lehota. After the first half of the 2. Liga season, Sylvestr amassed 15 goals in 17 appearances. His great form from led to rumors about him returning to the
First League, however Sylvestr denied these claims, saying that nobody had contacted him. == International career ==