If the Serbian midfielder helps Mourinho's team to the title, paying £40m for a 29-year-old will be forgotten
The definitive list of transfers in Europe's big five leagues
Rounding up all the transfer across Europe's top five leagues: England, France, Germany, Italy and Spain
World Soccer's images from the last seven days include the Gold Cup final, pre-season friendlies and the Women's Euro 2017 in Holland.
Recent big-money transfers have raised the profile of the Chinese Premier League but new rules may limit its ability to make further high-profile signings
World Soccer's images of the week include England winning the Euro U19 Championship and England beating Scotland in the Women's Euro 2017
Liverpool score well worked goal against Crystal Palace in Hong Kong
World Soccer's best images from the past week include action from Europa League qualifying, Brazil and the CONCACAF Gold Cup.
Bruma scores with a great volley for Portugal against Spain in the Euro U21's.
This week's big deals in the European transfer market