Bayern Munich's president Uli Hoeness has criticised the big spending by some of Europe's top clubs, labelling it as a sign of weakness.
Willi Orban says Naby Keita "went a bit past the limit" when he fouled Diego Demme in training, although Leipzig played down the incident.
West Ham have completed the signing of former Manchester United striker Javier Hernandez from Bayer Leverkusen.
The transfer window closes in a little over a month. Has your club had a good window to this point? Here's a status report on the business so far.
During Monday's session, the workout was ended abruptly following Keita's retaliatory challenge on one-time Germany international Demme.
Attacker Sancho joined City from Watford in a deal worth £500,000 in 2015.