Indian opener Shubman Gill had to depart due to a controversial umpiring decision during Day 4 of the World Test Championship (WTC) final against Australia at The Oval. Cameron Green dove to his right in the slip cordon and claimed an incredible catch.Gill stood his ground and the on-field umpires sent the decision to the third umpire to see if the catch was clean or not. The third umpire took his time and from the replays decided that the fingers were underneath the ball when Green took the catch and no part of the ball touched the grass.Captain Rohit Sharma was furious with the decision and Shubman Gill had to walk back to the pavilion in disbelief after 18 runs. Fans on Twitter slammed the third umpire for what they thought was an appalling decision with many posting stills of the ball having probably touched the ground even when Cameron Green had his fingers underneath the ball.Some former cricketers also took to Twitter to express their frustration over Shubman Gill's controversial decision. Here are some of the reactions:North Stand Gang - Wankhede@NorthStandGangGrass: Hey Cricket Ball you feel nice today.Cricket Ball: So do you Grass, so do you. twitter.com/surgicelll/sta…bharath shiva@surgicelll@Dhananjayasha19 @NorthStandGang 🥲🥲🥲81@Dhananjayasha19 @NorthStandGang 🥲🥲🥲 https://t.co/7Vc8DLFqxYGrass: Hey Cricket Ball you feel nice today.Cricket Ball: So do you Grass, so do you. twitter.com/surgicelll/sta…whyrat käwhli@anubhav__tweetswe're gonna have fair umpiring in the WTC finalRichard Kettleborough:1239we're gonna have fair umpiring in the WTC finalRichard Kettleborough:https://t.co/NghWvdqKQ4Avishkar🇮🇳@Avishkarsargul3#Gill yarr ye not out hai yarr 🥲🥺30192#Gill yarr ye not out hai yarr 🥲🥺 https://t.co/kJodcXLlQNSayam Ahmad@sayam_ahmad_Controversial decision by 3rd umpire. Virat Kohli to Gill:25442Controversial decision by 3rd umpire. Virat Kohli to Gill: https://t.co/lAl8AVkxkITrendulkar@Trendulkar🤔52290🤔 https://t.co/sFxyPNo7raVirender Sehwag@virendersehwagThird umpire while making that decision of Shubman Gill.Inconclusive evidence. When in doubt, it’s Not Out #WTC23Final171523580Third umpire while making that decision of Shubman Gill.Inconclusive evidence. When in doubt, it’s Not Out #WTC23Final https://t.co/t567cvGjubSports With Bros@brosswbAustralia is ahead of India by miles no doubt. But many field umpire calls in favour of Australia and now this Not out catch goes in favour of Australia. #INDvsAUS #WTC23Final #shubhmangill3Australia is ahead of India by miles no doubt. But many field umpire calls in favour of Australia and now this Not out catch goes in favour of Australia. #INDvsAUS #WTC23Final #shubhmangillNorth Stand Gang - Wankhede@NorthStandGangSo was freeze frame. twitter.com/NorthStandGang…North Stand Gang - Wankhede@NorthStandGangSlow Motion & Zoom was on leave today. #WTC23Final #ShubmanGill296Slow Motion & Zoom was on leave today. #WTC23Final #ShubmanGillSo was freeze frame. twitter.com/NorthStandGang… https://t.co/NcVzl8TUTiRitesh 🇮🇳@RiteshLockL umpiring. 🤷#WTCFinal51L umpiring. 🤷#WTCFinal https://t.co/JkZAZGSxlpAkash Deshpande@akashd7781Oval crowd is going cheaters cheaters…. Disgusting it wasn’t out93Oval crowd is going cheaters cheaters…. Disgusting it wasn’t outHansal Mehta@mehtahansalBad decision by 3rd umpire . Period.25717Bad decision by 3rd umpire . Period.Habil Ahmed@hblahmedWould someone be nice enough to explain the rule to me in case of catches like that? Thanks in advance 🥺2Would someone be nice enough to explain the rule to me in case of catches like that? Thanks in advance 🥺`@D0NALDRAP3R@mufaddal_vohra No way the 3rd umpire said "fingers underneath" when the ball hits the ground. He caught it but then the ball clearly hits the ground. Rigged game28510@mufaddal_vohra No way the 3rd umpire said "fingers underneath" when the ball hits the ground. He caught it but then the ball clearly hits the ground. Rigged gameSaurabh Malhotra@MalhotraSaurabhKettleborough. What were you expecting from him after all these years?877Kettleborough. What were you expecting from him after all these years?Rajasthan Royals@rajasthanroyalsMeanwhile in the commentary box:5146568Meanwhile in the commentary box: https://t.co/up9HN5HHlcWasim Jaffer@WasimJaffer14Third umpire watching the replay before pressing out 🤦 #WTCFinal125482006Third umpire watching the replay before pressing out 🤦 #WTCFinal https://t.co/ZTFeGsihpCShubman Gill's dismissal dented India's near-perfect startWhile chasing a mammoth target of 444 to win, India needed a bit of luck going their way. However, Gill's untimely wicket has put a brake to what was a rollicking start from India.Both Gill and Rohit looked pretty comfortable against the new ball and didn't shy away from putting the loose deliveries to the boundary. This was probably why the Indian captain was absolutely livid when the umpire adjudged Gill just at the stroke of Tea.Despite the setback, India will need to keep on thinking positively and take the run-scoring opportunities. Putting pressure on Australia through some positive approach seems to be the only way out for India in terms of getting a positive result from the WTC final.