Axel Witsel's first-half strike saw Borussia Dortmund restore its six-point advantage at the Bundesliga summit with a 1-0 victory over RB Leipzig.
Callum Hudson-Odoi has been hailed as an "outstanding talent" by former Germany star Michael Ballack.
Leonardo Balerdi has swapped Boca Juniors for Borussia Dortmund after signing a long-term deal at Signal Iduna Park.
France and Stuttgart full-back Benjamin Pavard will join Bayern Munich at the end of the season.
Bayern Munich winger Arjen Robben said he is keeping his options open as he prepares to leave the Bundesliga champion.
Franck Ribery's social media outburst was the result of a prolonged period of abuse, according to Bayern Munich's Thomas Muller.
Bayern Munich coach Niko Kovac has claimed he is in the dark over a potential move for Chelsea youngster Callum Hudson-Odoi but confirmed his interest in the player.