Sporting CP want an improved offer from Manchester United for midfielder Bruno Fernandes.
The Superliga season is set to resume as scheduled despite Boca Juniors' protestations over a clash with Olympic qualifying.
Less than six months on from joining Boca Juniors, Daniele De Rossi has left the club and retired from football.
Miguel Angel Russo, 63, will lead Boca Juniors for a second time, having guided the Argentine powerhouse to Copa Libertadores glory in 2007.
While dismissing a return to Boca Juniors, Diego Maradona nominated Mauricio Pochettino to be head coach.
Boca Juniors forward Cristian Pavon starred on loan for LA Galaxy last season and will be back with the club again in 2020.
Salzburg striker Erling Haaland and Borussia Dortmund winger Jadon Sancho are in Manchester United's sights as January approaches.
Liverpool are reportedly set to battle Real Madrid for Paris Saint-Germain star Kylian Mbappe.
Boca Juniors edged Tuesday's second leg 1-0 but it was not enough as defending champions River Plate prevailed 2-1 on aggregate.
Marcelo Gallardo's River Plate are favourites to once again overcome bitter rivals Boca Juniors in the Copa Libertadores.