Wolfsburg have signed German international midfielder Julian Draxler from Schalke on a five-year contract.
Kevin de Bruyne watched from the stands as Wolfsburg moved to the top of the Bundesliga with a 3-0 home win over Schalke.
There were Bundesliga wins for Bayer Leverkussen and Bayern Munich, while Wolfsburg and Schalke were held to draws.
Werder Bremen have confirmed Franco Di Santo has activated a release clause in his contract to leave the club immediately.
Bayern Munich will host Hamburg on the opening weekend when the 53rd Bundesliga season gets under way on August 14.
Cologne have signed midfielder Milos Jojic from Bundesliga rivals Borussia Dortmund, the club have announced.
Schalke have signed Brazilian right-back Junior Caicara from Bulgarian champions Ludogorets Razgrad.
Schalke have completed the signing of Germany U21 international Johannes Geis from Mainz on a four-year deal.
Schalke defender Benedikt Howedes says he has rejected the chance to join Arsenal this summer.
Schalke have appointed former Paderborn boss Andre Breitenreiter as their new head coach.
Bayer Leverkusen have completed the permanent signing of centre-back Kyriakos Papadopoulos from Schalke.
Roberto Di Matteo has resigned as head coach of Schalke, citing "frustration" and a difference of opinion.
Liverpool give U21s more game time than Premier League rivals but top flight lags behind Europe.
Hamburg earned a second chance at securing their Bundesliga status with a 2-0 win over Schalke.
Jerome Boateng has jumped to the defence of brother Kevin-Prince Boateng by claiming Schalke are using him as a scapegoat.
Schalke midfielder Marco Hoeger is free to play in the final match of the season after his club suspension was lifted.
A last-gasp own-goal broke Paderborn hearts as they slumped to a 1-0 defeat at Schalke.
Schalke have released Kevin-Prince Boateng and Sidney Sam in the wake of their 2-0 Bundesliga defeat to Koln on Sunday.
Cologne secured their top-flight status for next season with a 2-0 victory over Schalke.
Bas Dost scored twice as Wolfsburg secured a Champions League spot, while Cologne guaranteed survival.