Al Hilal, who are going great guns on the continental and domestic fronts, announced the signing of Kaio on Wednesday.

The 20-year-old, who essentially plays on the right, has joined Al Hilal on a 30-month contract from Portugal's Vitoria Guimaraes SC.

Qatar champions Al Sadd signed 27-year-old right-winger Claudinho from Russian side Zenit St. Petersburg.

Japan's Nagoya Grampus have re-signed Mateus with the Brazilian having previously played for the J1 League side between 2019 and 2023.

The right-winger, 30, joins Nagoya from Saudi Pro League side Al Taawoun on a 2.5-year contract.