On 4 May, Basel announced that they had signed 18-year-old Paraguayan defender Blás Riveros on a five-year deal. Due to Riveros' commitments with the Paraguay national team at the upcoming Copa América Centenario, he will not be expected to join the Basel first team until the beginning of July. On 10 May, Basel also announced that they had signed Egyptian defender Omar Gaber from Zamalek on a four-year deal.