For a long time, Daniel Kretinsky was compromised when it came to his ability to make major decisions at West Ham United. Yet the recent changing of the guard at the London Stadium offers an opportunity for a fresh start, of sorts.Last Saturday, Kretinsky became the club’s largest shareholder in the wake of David Sullivan’s resignation as chairman, after Vanessa Gold, the daughter of the late David Gold, agreed to sell some of the family’s shares to the Czech billionaire.Kretinsky’s stake has risen to 43 per cent from 27 per cent, which surpasses Sullivan’s 38.8 per cent. The 77-year-old has been accused of sexually exploitative and predatory behaviour against women over several decades, which he “categorically denies”.In a recent interview with Czech podcast Vsechno zacina dnes, Kretinsky discussed his inability to make key changes. But he has shown more authority at board level, with the timing of Graham Potter’s sacking a case in point.The former Brighton & Hove Albion and Chelsea manager was jettisoned in late September having won only six of his 25 games during his eight months in charge. Sources with knowledge of the situation, who spoke to The Athletic on the condition of anonymity to protect relationships, say Kretinsky strongly opposed other board members’ pitch for Potter’s dismissal before the start of the 2025-26 season. He at least succeeded in pushing back that decision until the autumn.Fast forward to May and the 50-year-old, who purchased his initial stake in November 2021, played an important role in Nuno Espirito Santo remaining as head coach following West Ham’s relegation to the Championship.Nuno Espirito Santo will lead West Ham United’s pursuit of promotion from the Championship (Henry Nicholls/AFP via Getty Images)A new era has dawned over recent weeks, with Sullivan stepping down. Preparations for life in the second tier are underway with the Czech now integral in the club’s ambitions to secure immediate promotion back to the top flight. Behind the scenes, West Ham’s non-playing staff have praised Kretinsky’s calm demeanour, honesty and professionalism.He works closely with his right-hand man Jiri Svarc, an ex-board member and JP Morgan investment banker. Given Svarc’s background in finances, he advises Kretinsky about West Ham’s situation and the best ways to help structure the club.