Just because one is good at football doesn't necessarily mean he'll know how to manage, and these eight individuals should have heeded such advice before they stepped out of their playing boots and into the dugout.
Even some of the world's best couldn't quite cut it as a football manager and here are eight such legends...
8. Edgar Davids
Team managed: Barnet
However, he almost destroyed his reputation with an ill-fated spell as player-manager of Barnet. The spectacle-wearing pitbull led the Bees to relegation from the Football League, was sent off three times in eight games and refused to attend certain away games.
7. Gary Neville
Team managed: Valencia
One of the best right-backs in Premier League history, Gary Neville was a Manchester United mainstay under Sir Alex Ferguson and it came as no surprise that he entered the world of football coaching like many of his former teammates.
However, Neville left his role in the England national team backroom staff to take the reigns at Valencia, where brother Phil was already a coach. Neville lasted just four months though, winning just three games as Los Che dangled above the drop zone.
6. Paul Gascoigne
Team managed: Kettering Town
A gem of a player, Paul Gascoigne's off-field problems have been suggested to have harmed his attempts at management, which lasted just just over a month with non-league side Kettering Town.
The former England international initially gained some coaching experience with Chinese side Gansu Tianma and Boston United, but his senior role with the Poppies did not go to plan, with the club's chairman sacking him for reportedly being drunk each day.
5. Hristo Stoichkov
Teams managed: Bulgaria, Celta Vigo, Mamelodi Sundowns, Litex Lovech and CSKA Sofia
The 1994 Ballon d'Or winner is the greatest Bulgarian footballer of all time, but he is most certainly not the greatest Bulgarian manager of all time after consistently failing, despite multiple attempts.
Stoichkov's role as manager of the Bulgarian national team was a disaster from start to finish; as they failed to qualify for two successive multiple tournaments, while he also directed Celta Vigo to drop out of La Liga.
4. Alan Shearer
Team managed: Newcastle United
With the Magpies embroiled in a relegation battle as manager Joe Kinnear fell ill, they turned to former striker and all-time Premier League top goalscorer Alan Shearer to guide them to safety.
However, the former England number nine could muster just five points from a possible 245 and the Tyneside club dropped out of the top flight. Needless to say, that was Shearer's sole stint into management.
3. Sir Bobby Charlton
Team managed: Preston North End
Undoubtedly one of the greatest players in English football, Sir Bobby Charlton's legacy will be less remembered for a brief spell as the manager of Preston North End in the early 1970s, whom he saw relegated.
As a player though, the former Manchester United forward helped the Red Devils to European Cup success, while also being part of the famous England team that won the World Cup in 1966.
2. Diego Maradona
Teams managed: Mandiyu de Corrientes, Racing Club, Argentina, Al Wasl and Fujairah
Much like Gascoigne, Maradona has always seemed to have issues away from the pitch, yet no one would dare question the Argentinian's playing ability, with the World Cup winner still considered one of the greatest of all time.
As a manager though it's been a far different story. He lasted a total of 23 combined games with his first two roles, before seeing Argentina thrashed 4-0 by Germany at the 2006 World Cup. Not much is expected of him in his current position UAE side Fujairah.
1. Tony Adams
Teams managed: Wycombe Wanderers. Portsmouth, Gabala and Granada
A multiple title-winning captain with Arsenal, Tony Adams seemed the perfect footballer to enter management once his career ended due to his brilliance as a leader and exceptional centre-back.
Adams first tried his luck in League One with Wycombe, but that soon became League Two with Wycombe. He lasted just 16 games with Pompey and his latest foray was a farcical job in Spain, where he guided Granada to a bottom-placed finish in La Liga.