|Czech point guard Radovan Kouril, who leads the tournament with a staggering 8.5 assists per game, dished out nine and scored 16 points in the game against Estonia, that decided first place in Group B|
The Montenegrins came up with a big fourth quarter to beat Sweden 82-71 and pip Finland to first place in Group C.
In an excellent contest, Sweden finished the opening quarter on an 8-0 run to lead 19-10 but Montenegro came back to snatch a narrow 38-36 half-time lead on Veselin Kovacevic's jump-shot.
Sweden had edged back in front by the start of the final stanza and led 60-57 with seven minutes to go, but Montenegro finished on a 25-11 charge to win the game, with Luka Djurovic and Nikola Zizic scoring 18 each.
The Czechs finished top in Group B with a 4-0 record as they cruised past Estonia, 95-70.
They broke the game open in the first quarter, using a 12-0 run capped by Karel Ausprunk's three-pointer to power into a 23-10 lead.
Not satisfied with that, they started the second quarter on an 11-3 run to lead 56-35 at half-time and then eased further away in the second half.
Ausprunk led the Czechs with 22 points and six rebounds while point guard Radovan Kouril added 17 points and nine assists.
Despite the loss, Estonia also advanced to the Second Round.
In the other game of the group, the Slovak Republic recorded their first win, beating Luxembourg 70-63.
It was a tight finish in Group D with the Netherlands beating Belgium 79-74 and Portugal topping Georgia 81-59 to create a three-way tie in the battle to join Bosnia and Herzegovina in the next round.
It was Belgium who sneaked through though, having routed Portugal priot ot their narrow loss to the Dutch.
Second Round Starts Tuesday
The Czech Republic and England will carry a 1-0 record into Second Round Group E, where they are joined by Israel and Estonia, both starting with a 0-1 record.
Hosts Bosnia and Herzegovina and Montenegro meanwhile are the top seeds in Group F, both with one win to their account, while Finland and Belgium complete the pool with no wins to their name.