Luciano Sanchez suffered a horrific leg break after a challenge from Marcelo during Fluminense's clash against Argentinos Juniors in the Copa Libertadores. Fans were left shocked at the extent of the devastating injury.The former Real Madrid defender went for the ball and inadvertently injured his opponent, whose leg broke from the knee. It was a devastating affair and the injury could turn out to be a potential career-ender.Trigger Warning: Watch the video of the incident:Total Football@TotalFootbolMarcelo accidentally broke Luciano Sanchez's leg in the Libertadores and left the pitch in tearspic.twitter.com/CKImYGqM7w1200216Marcelo accidentally broke Luciano Sanchez's leg in the Libertadores and left the pitch in tearspic.twitter.com/CKImYGqM7wWhile the Copa Libertadores clash ended in a 1-1 stalemate, Sanchez's injury took the focus away from the focus of the game. Shocked fans took to Twitter to express their feelings on the incident. One of them wrote:"Fluminense’s Marcelo was sent off for this horrible challenge on Argentinos Juniors’ Luciano Sánchez in the#Libertadores. Easily one of the worst injuries I’ve ever seen."Here are some Twitter reactions as Luciano Sanchez suffered a leg break in the Copa Libertadores clash against Fluminense:LEGEND | CR7@NSSR_199@TotalFootbol @TrollFootball He did not mean to hurt the opposing player's leg.. Marcelo has high morals38@TotalFootbol @TrollFootball He did not mean to hurt the opposing player's leg.. Marcelo has high moralsPerez@reztrend@TotalFootbol It wasn't intentional for sure. Quite unfortunate Wish Luciano speedy recovery .8@TotalFootbol It wasn't intentional for sure. Quite unfortunate Wish Luciano speedy recovery .🏆Champions 55🏆@Scottb_1872@TotalFootbol @craig_77 Wow that’s brutal! Hope the player makes a full recovery? Marcelo must be gutted this has happened..@TotalFootbol @craig_77 Wow that’s brutal! Hope the player makes a full recovery? Marcelo must be gutted this has happened..Football Report@FootballReprtMarcelo just took away a man's ability to walk, WTFpic.twitter.com/3DfsZ0i1WN2057318Marcelo just took away a man's ability to walk, WTFpic.twitter.com/3DfsZ0i1WNNeymoleque | Fan 🇧🇷@NeymolequeMarcelo just accidentally broke Luciano Sanchez’s leg in the Libertadores.Horrible scenes. He got a red card & left the pitch in tears. pic.twitter.com/yP4A3NM9Sb107621585Marcelo just accidentally broke Luciano Sanchez’s leg in the Libertadores.Horrible scenes. He got a red card & left the pitch in tears. pic.twitter.com/yP4A3NM9SbRoberto Rojas@RobertoRojas97Fluminense’s Marcelo was sent off for this horrible challenge on Argentinos Juniors’ Luciano Sánchez in the #LibertadoresEasily one of the worst injuries I’ve ever seen. pic.twitter.com/UzZhmLtY3l527116Fluminense’s Marcelo was sent off for this horrible challenge on Argentinos Juniors’ Luciano Sánchez in the #LibertadoresEasily one of the worst injuries I’ve ever seen. pic.twitter.com/UzZhmLtY3lMarcelo issued a statement after Luciano Sanchez's injuryThroughout his career, Marcelo has been one of the most likable characters among fans for his joyous mood on and off the pitch. The player has always been one with the spirit of the beautiful game.In the aftermath of inadvertantly breaking Luciano Sanchez's leg, the Brazilian defender released a statement on Twitter to express his regret, saying:"Today I have had to live through a very difficult moment on the pitch. I have inadvertently injured a colleague. I want to wish you the best possible recovery, Luciano Sánchez. All the strength in the world!"Marcelotwelve@MarceloM12Hoy me ha tocado vivir un momento muy difícil dentro del campo. Sin querer he lesionado a un compañero de profesión. Quiero desearte la mejor recuperación posible, Luciano Sánchez. Toda la fuerza del mundo! 🏾#M12 twitter.com/i/web/status/1… pic.twitter.com/vaG04hvioW22870518194Hoy me ha tocado vivir un momento muy difícil dentro del campo. Sin querer he lesionado a un compañero de profesión. Quiero desearte la mejor recuperación posible, Luciano Sánchez. Toda la fuerza del mundo! 💜🙏🏾#M12 twitter.com/i/web/status/1… pic.twitter.com/vaG04hvioWA total leg break is one of the worst injuries a football player can suffer on the pitch, and could take away an individual's ability to play at the same level after one such incident. Fans will hope that Sanchez can recover well from the gruesome blow he suffered.