Manchester United are reportedly weighing up a £12m move in January for Sao Paulo's Rodrigo Caio, with PSG and AC Milan also interested.
Japanese international Takuma Asano has joined Bundesliga club Stuttgart on a season-long loan from Arsenal.
Arsenal winger Serge Gnabry is reportedly attracting the interest of a trio of Bundesliga clubs after a strong showing at the Rio Olympics.
Barcelona superstar gave Brazil the lead in the Olympics final with an amazing free-kick from over 25 yards that swerved past the keeper into the top-left corner.
Brazil aim to vanquish the ghosts of 2014 World Cup semi-finals while Germany prepare for another assault on the hosts as both the nations vie for gold at Rio.
Rodrigo Caio, who will be vying for a gold medal in the Olympics against Germany this Sunday in Rio, is a target for Italian giants AC Milan. Milan and Sevilla both want to sign the central defender from Brazillian club Sao Paulo.
Barcelona superstar Neymar scored the fastest goal in Olympic history in the semi-finals at Rio, opening the scoring for Brazil against Honduras.
Neymar scored a wonderful free-kick to give Brazil an early 1-0 lead against Colombia in the quarter-final of the Rio Olympics.
German Olympic coach Horst Hrubesch has criticised the lack of faith shown by Arsenal in young forward Serge Gnabry, who has been in excellent form in Rio.
Arsenal are reportedly interested in securing the services of Lukas Klostermann from RB Leipzig to bolster their defence ahead of the season.