The Qatari duo won three matches today at the Katara Cultural Village in the country's capital.

This culminated in a fightback from a set down against Poland's Michal Bryl and Grzegorz Fijalek to reach the semi-finals.

They lost the first set 15-21 before winning the next two 21-15, 15-10.

"I'm so tired, but I gave my best until we got there," Tijan said.

"It will be the same tomorrow and we will give our best to be in the final because it is a beautiful venue and I want to carry on playing here. 

"In the first set the guys were serving so well and that made receiving hard. 

"But we started to play better in the second set and used our service to pressure them."

Dutch duo Alex Brouwer and Robert Meeuwsen lie in wait next after they won a thrilling quarter-final against Saymon Santos and Alvaro Filho of Brazil.

They lost a nailbiting second set before edging the third in a 19-21, 21-19, 22-20 victory.

United States' umber one seeds Phil Dalhausser and Nick Lucena survived a marathon first set to eventually beat Polish pair Piotr Kantor and Bartosz Losiak 37-35, 13-21, 15-6 on a day of close tussles.

Kantor and Losiak eventually pulled-out through injury.

Russia'ss Oleg Stoyanovskiy and Igor Velichko enjoyed a more straightforward 21-15, 21-13 victory over Aleksandrs Samoilovs and Janis Smedins of Latvia to complete the semi-final line-up.

The tournament in Doha, which does not include a women's event, continues tomorrow.