Cameroon captain and striker Samuel Eto'o has missed training for a second straight day at the World Cup and is an injury doubt for the must-win group game against Croatia.
Eto'o was again absent for the workout on Sunday at Cameroon's base in Vitoria and coach Volker Finke said the Chelsea forward was struggling with the same right knee injury he nursed throughout the buildup to the World Cup.
Cameroon lost 1-0 to Mexico in their opening Group A match and will next face Croatia, who lost their first game to Brazil, on Wednesday.
This World Cup is likely to be the last for the 33-year-old Eto'o, Cameroon's leading all-time scorer. He is playing at his fourth World Cup.