Chelsea have reportedly set their sights on signing Bayern Munich and Wolfsburg stars Arturo Vidal and Ricardo Rodriguez.
Chelsea boss Antonio Conte is keen to bolster his squad ahead of a Premier League title push.
The Blues dropped points for the first time in 14 matches against Tottenham on Wednesday night.
It proved a reality check for Chelsea who saw their lead at the top of the table cut to just five points.
And Spanish website Don Balon claim that Conte has set his sights on a Bundesliga raid to ensure they are crowned champions at the end of the season.
Vidal worked under Conte at Juventus before the 47-year-old took the Italy job in 2014.
The Chile international won three Serie A titles under his former boss and could be tempted by a reunion at Stamford Bridge.
It is said that Conte wants another left-back to provide competition for Marcos Alonso.
Alonso has been in stellar form since arriving from Fiorentina on deadline day.
But Rodriguez could move to the capital after shining for Wolfsburg over the past four-and-a-half years.