Colombia international Arias seems set to depart during the summer transfer window, with Serie A outfit Napoli understood to be among his suitors.
Reports from the Netherlands now claim PSV have set their sights on Panama international Murillo and the 22-year-old could well be open to a switch to Europe after featuring at the World Cup for his country.
PSV may face a fight for Murillo however, as Belgian side Standard Liege are also thought to be interested in the full-back.
Angry Alan Stubbs dubbed St Mirren's display against minnows Spartans 'unacceptable' after watching them scrape to a Betfred Cup bonus point on penalties.
Motherwell boss Stephen Robinson has called for more of the same from Elliott Frear after the player hit a hat-trick in their opening game of the season.
Motherwell kicked off their season in style with a 5-0 win over Edinburgh City in the Betfred Cup on Tuesday evening.
Steven Gerrard admitted he has concerns about Rangers' shot-shy strike-force after their stalemate with FK Shkupi in Macedonia.
Sunderland midfielder Wahbi Khazri has completed his move to French club St-Etienne, the Black Cats have announced.