[6] Hopp entered Q School in an attempt to win a PDC Tour Card to play the full circuit in 2013,[7] but could not get past the last 64 in any of the four days.

[13] Hopp beat Mark Walsh 6–4 in the opening round of the German Darts Championship and was then defeated 6–3 by Jamie Caven.

[14] Hopp lost in the semi-finals of the German World Championship Qualify to Andree Welge, but reached the tournament anyway due to finishing the year eighth on the European Order of Merit which saw him claim the first of four spots available to non-qualified players.

[24] However, his play during 2014 and at the World Championship saw him rise 14 places in the rankings during the year to start 2015 62nd, the first time Hopp has been inside the top 64 who gain their PDC tour cards.

[25] At the first UK Open Qualifier he eliminated Kevin Painter, Ian White and Michael Smith to play in his first quarter-final in the PDC, where Brendan Dolan beat Hopp 6–5.

He partnered Jyhan Artut and they saw off India and Austria to make the quarter-finals, where they lost both their singles matches against England to exit the tournament.

[28] He was invited to play in the inaugural World Series of Darts Finals and saw off Dimitri Van den Bergh 6–3, before losing by a reversal of this scoreline to Peter Wright in the second round.

[31] He couldn't qualify for the UK Open, but at the fourth Players Championship he reached his first quarter-final in a year by seeing off Mensur Suljović 6–2.

[35] His World Youth title qualified Hopp for his first Grand Slam of Darts where he was beaten 5–4 by Brendan Dolan and defeated Martin Adams 5–2, but a 5–1 loss to Michael van Gerwen would see him finish third in Group A and exit the tournament.

He defeated Alan Norris 6–2 in the first round, then had wins over Davy van Baelen 6–4, Darren Webster 6–2, Jamie Hughes 6–1, Jermaine Wattimena 6–5 in a deciding leg to reach the semi-finals.

[43] In August 2024, he made his return to the PDC European Tour, appearing at the 2024 German Darts Championship as a host-nation qualifier.

[44] In his first-round match, a first big-stage appearance in two years, he defeated José de Sousa 6–2 before losing in the second round to Joe Cullen.