Work on improving penalty box anticipation and reactions, for both defensive and offensive players. This is crucially important because every game is decided by penalty box behaviour. MORE
Guus Hiddink was most recently interim manager of Chelsea having returned for his second spell at the club on the 19th December 2015.
Guus Hiddink's initial appointment by Chelsea in February, 2009 can be traced back to a relationship he forged during his playing career - with fellow Dutchman, Piet De Visser, who became a personal advisor to Roman Abramovich.In between playing under De Visser's management at De Graafschap and being headhunted by Chelsea owner Abramovich, Hiddink established himself as an immensely successful manager at both club and international level.
He has led three countries to major tournaments, two of them to semi-finals. And with 10 domestic trophies in Holland, he became the most successful coach in Dutch football history.
Hiddink opened by winning three trophies in one season - 1987-88 - for PSV Eindhoven where he had been a player and assistant manager. He also led the club into the European Cup for the first time.After spells with Fenerbahce and Valencia, Guus became Holland manager in 1995, healing rifts within the team to guide them to the World Cup semis three years later. He was briefly in charge of Real Madrid and Real Betis before becoming South Korea coach.
The country had yet to win a game in five World Cups but in 2002, as one of the host nations, South Korea beat Poland, Portugal, Italy and Spain before being vanquished by Germany in the last four of the competition.
Hiddink - who had the national stadium renamed after him and became the first foreigner given honorary South Korean citizenship - returned to Holland with PSV to win five more Dutch trophies and steer the team into the last four of the Champions League.
He combined the job with managing Australia in 2005. The following year, the Socceroos competed in the World Cup finals after an absence of 32 years. They achieved their first ever tournament win - against Japan - and reached the second round before being narrowly beaten by Italy.
The Abramovich link saw Hiddink take charge of Russia. He secured their qualification for Euro 2008 and masterminded a passage to the semi-finals.
Chelsea turned to Hiddink after the departure of Luiz Felipe Scolari and he enjoyed success during his time in charge, winning The FA Cup in 2009 after a 2-1 win over Everton at Wembley.
After Chelsea, Hiddink returned to Russia before he was confirmed as the new manager of the Turkish national team, beginning the role in August 2010. He remained as their national coach until November 2011.