Rwandan president and Arsenal fan Paul Kagame has vented his frustration at the club's shock defeat by a newly promoted club on the opening day of the English Premier League season.
Brentford, after a 74-year absence from top-tier football, beat Arsenal 2-0.
Mr Kagame often comments on the Gunners - a club sponsored by his government.
After Friday's away game, he tweeted: "We just must NOT excuse or Accept mediocrity. A team has to be built with purpose to win win win.
"So that when we lose....it was not to be expected! I am sure we all know on whose shoulders the heaviest burden rests. I hope they know too or even accept it!!! End."