Middlesbrough striker Sanli Tuncay could miss this weekend's Premier League clash at Portsmouth after picking up a knee injury on international duty.
The 26-year-old limped out of Turkey's World Cup qualifier against Belgium on Wednesday after only 13 minutes.
To add to Boro boss Gareth Southgate's concerns, Mido suffered a slight hamstring strain while playing for Egypt.
Earlier in the week Southgate had challenged Tuncay to grab more goals for the club this season.
After netting eight times last term, the former Fenerbahce star scored the winner in the 2-1 victory against Stoke City, and Southgate wants more of the same, telling the Evening Gazette: "I was pleased for Tuncay to get off the mark against Stoke.
"He's started the season well and he's been getting into good positions.
"That bit of skill he showed at Anfield was extra special and it's the sign of a special player.
"It was a fabulous finish against Stoke too and he deserved it for his perseverance.
"But I think Tuncay can score more goals than he does. There are a lot more goals to come from him and, if everything goes well, I expect him to score more than his fair share for us this season."