In the 2010 FIBA World Championship, Fernández averaged 15.6 points, 6.0 rebounds, 1.7 assists, and 1.8 steals per game, but Spain only took sixth place in the tournament. Fernández then participated in EuroBasket 2011, where Spain won the gold medal, and clinched a spot in the 2012 Summer Olympics, where he won a silver medal with Spain. He also played at EuroBasket 2013, where he won a bronze medal, at the 2014 FIBA Basketball World Cup, at EuroBasket 2015, where he won a gold medal, and at the 2016 Summer Olympics, where he won a bronze medal.