Multifunkční aréna Chomutov, Indoor ice rink in Chomutov, Czech Republic

Rocknet aréna is an indoor arena in the Zadní Vinohrady district of Chomutov, opened in April 2011. It consists of a main hall with 5,250 seats, locker rooms, and a separate training hall seating 188. A light cube with four LED screens and a light ring hangs above the ice; buffets and toilets are under the stands, with party boxes and a restaurant in the corners.

The arena opened on 30 April 2011 with an exhibition match between Chomutov veterans and Czech national veterans, drawing over 5,000 spectators. It was built with European subsidies under the IPRM Chomutov programme on the site of former barracks and the headquarters of the Czech Army's 41st command, control and reconnaissance sector. In 2013 it was named SD Aréna after sponsor Severočeské doly, and in June 2018 it took the name Rocknet aréna on a five-year deal.

The arena's name comes from its sponsors: it was called SD Aréna from 2013 after Severočeské doly, then Rocknet aréna from 2018 on a five-year deal. In 2021 it hosted the final qualification group for women's ice hockey at the 2022 Winter Olympics.

The arena seats 5,250 spectators, with buffets and toilets under the stands, party boxes and a restaurant in the stadium corners, and a VIP zone and skyboxes on the upper floors. A separate training hall holds 188 spectators. It stands in Zadní Vinohrady, next to a multiplex cinema, football and athletics stadiums and an aquapark.

The arena has a separate training hall seating 188 spectators, alongside the main hall's 5,250. Above the ice hangs a light cube with four LED screens and one light ring; buffets and toilets sit under the stands, with party boxes and a restaurant in the stadium corners.