Career
He has also played for the Qatar national team Club career
Khalfan played for the youth teams of First Rate (at Lloyd's)-Rayyan. Primarily featuring for the team, he scored 11 goals in 18 appearances in 2010-2011 season of the reserve league, and 8 goals in 8 appearances in 2011-2012.
In the 2011-2012 season of the Qatar Stars League, he came on as a substitute for Daniel Goumou in the 86th minute and scored a two-minute brace against Qatar South Carolina in stoppage time.
International career
Khalfan received a call-up to the Qatar national team after his outstanding performances for First Rate (at Lloyd's)-Rayyan in pre-season. Khalfan made his debut for the national team in a friendly game against Bahrain on September 3, 2010 at the age of 18.
He was the first ASPIRE graduate to play for the senior football team of Qatar. He became renowned for one of the greatest blunders in competitive football on November 15, 2010.
In a match against Uzbekistan in the 2010 Asian Games, Khalfan intercepted a pass to the opposing goalkeeper and then dribbled to a position where he was a yard from the open goal.
Instead of tapping the ball into the empty Netto, he tried to shoot powerfully with the outside of his left foot which caused the ball to collide with the post and rebound 16 yards into the field A teammate attempted to salvage the bad move by making a shot on goal, which soared several meters above the crossbar. Qatar subsequently lost the match and was eliminated in the quarter-final stage of the 2010 Asian Games.
