In the beautiful game, injuries are frequent and will always play a part in a footballer's career. But there are few sights more disheartening than seeing a player being stretchered off not knowing whether they will return back to their best, or even return at all.
The recent double leg break Manchester United's Luke Shaw suffered was an unkindly reminder to all fans and professionals that one tackle can change everything in a career.
The grotesque footage of the challenge from PSV's Hector Moreno showed Shaw's leg break in graphic detail and, whilst supporters hope the left back can return in nine months (next season) to pick up where he started this campaign in terrific form, the future looks bleak.
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A tackle that severe (albeit Moreno won the ball) can leave mental scars to go with the physical ones, but hopefully the 23-year-old will be able to make a successful return to Old Trafford and re-establish himself as one of the brightest English talents in the game.
As Shaw starts the long road to recovery, here is a look at five other horrendous injuries suffered in the English game...
5. Alan Smith
In a freak injury, the then Manchester United midfielder broke his left leg and dislocated his ankle after falling awkwardly from blocking a John Arne Riise free-kick in an FA Cup game against Liverpool in 2006.
Sir Alex Ferguson described the injury "one of the worst I've seen". The Yorkshireman was out for eight months, but it took the former England player 18 months to fully recover.
4. Aaron Ramsey
The Welshman broke his right leg back in 2010 after a Ryan Shawcross challenge. There were emotional scenes at the Britannia Stadium with several Arsenal players looking visibly shaken up and distraught from the tackle.
Then only 19 years of age, Ramsey spent nine months on the sidelines and was loaned out to Nottingham Forest and Cardiff City before cementing a place in Arsenal's starting eleven.
3. Kieron Dyer
In a career filled with injuries, Kieron Dyer suffered a double leg break only ten days after making his West Ham debut in a League Cup match against Bristol Rovers in 2007.
The winger's career looked in tatters but, after 17 months out, Dyer made his return. The 36-year-old became a bit part player due to sustaining regular injuries at the Hammers before moving to Ipswich, QPR and Middlesbrough. Dyer announced his retirement in 2013.
The former Arsenal striker looked red hot in his first season with the Gunners but, in a league game against Birmingham City in February 2008, the Croatian suffered a broken leg and a dislocated ankle from a Martin Taylor tackle.
The challenge was so horrific that Sky Sports decided not to show replays of the incident and a furious Arsene Wenger called for a lifetime ban for Taylor.
Eduardo was out of action for 12 months and was never able to return to the same form he had in his first half season at the Emirates Stadium. The 32-year-old currently plays for Shakhtar Donetsk.
1. Alf-Inge Haaland
The infamous rivalry between the Norwegian Haaland and Irishman Roy Keane was cut to a premature end after a vindictive challenge from Keane during a league game on April 2001.
The former Leeds defender was involved in a tangle with Keane that left the Manchester United captain injured for almost a year with anterior cruciate ligament damage in 1997. The Norwegian protested his challenge and verbally taunted the midfielder, whilst Keane was laid out on the pitch.
In an act of vengeance, according to the Irishman's autobiography, the midfielder brutally left his mark on Haaland; stamping on his right knee in a league game between both Manchester clubs.
Keane was fined £5,000 and received a three-match ban. Haaland suffered with persistent knee injuries and failed to recover to full match fitness before retiring in 2003.