Mumbai Indians (MI) endured a crushing 103-run defeat against Chennai Super Kings (CSK) in their IPL 2026 clash at the Wankhede Stadium on April 23. CSK dominated the match from the outset, fueled by a blistering century from Sanju Samson that propelled the team to a formidable total of 207-6. Mumbai’s chase faltered early, as they lost three wickets during the powerplay. Despite a promising fifty-run partnership between Tilak Varma and Suryakumar Yadav, the Mumbai Indians could only muster 104 runs, largely undone by Akeal Hosein’s clinical four-wicket haul.
MI vs CSK marred by concussion sub controversy
Beyond the on-field result, the match was marred by controversy regarding the decision to replace Mitchell Santner with Shardul Thakur. During the Chennai innings, Santner had appeared to injure his shoulder while taking a catch, which forced him to leave the field. However, the subsequent decision to introduce Shardul Thakur as a concussion substitute left many spectators and observers confused, as the nature of the replacement seemed to contradict the initial reports of a shoulder injury.
ALSO READ: New Zealand legend announces retirement, set to quit international cricket after 2026 T20 World Cup
MI issue statement on controversial Shardul-Santner concussion switch
Addressing the situation, Mumbai Indians coach Mahela Jayawardene moved to clarify the controversy. He explained that in addition to his shoulder injury, Santner had also taken a blow to the head during the fielding effort and subsequently felt unstable. Jayawardene emphasized that the decision to approve Shardul Thakur as a concussion substitute was made entirely by the match officials, including the referee and the umpires.
“Santner hit his head first, the neck and obviously, the shoulder as well. He then went for a scan. Once he got back, he was lying down. Yes, the ice was there for the shoulder, but he felt that he wasn’t stable, so we took him for a scan in that situation,” Jayawardene said after the match.
“We requested a concussion sub. It’s at the match referee and the umpires’ discretion. They allowed Shardul Thakur. It is what it is. But hopefully, Santner’s injury isn’t too bad. Once he's back, we'll have a look at it,” he added.
ALSO READ: Is skipper Hardik Pandya's form a concern? MI coach breaks silence after massive defeat against CSK
The decision to introduce Shardul as a concussion substitute immediately sparked widespread debate. Observers were quick to point out that Santner had been seen with a bandage on his shoulder, leading many to believe that his injury was physical rather than a head trauma. This visual discrepancy created significant skepticism regarding the validity of the concussion substitution, as the player appeared to be suffering from a shoulder issue.
What does the rule say?
Under International Cricket Council (ICC) regulations, teams are required to pre-nominate their concussion substitutes before the start of the match to ensure they cover specific roles, such as batters, bowlers, or all-rounders. When a player suffers a suspected concussion, the authority to approve a replacement rests solely with the match referee, who must review the circumstances before officially permitting the substitute to take the field.