Anthony Joshua's promoter Eddie Hearn denies heavyweight suffered panic attack before shock defeat to Andy Ruiz Jnr with boxer's father confronting him after the fight By Jordan Seward For Mailonline Published: 09:13 BST, 4 June 2019 | Updated: 09:31 BST, 4 June 2019 Viewcomments Eddie Hearn has rejected claims Anthony Joshua suffered a panic attack before his extraordinary defeat against Andy Ruiz Jnr. The rumour mill has been in overdrive since Joshua's shock stoppage loss to Ruiz last weekend which saw the first ever Mexican world heavyweight champion crowned. However, Joshua's promoter has dismissed all speculation surrounding the Brit's well-being ahead of Sunday's fight. Anthony Joshua suffered a shock knockout defeat against Andy Ruiz Jnr at the weekend It was claimed that Joshua wanted to pull out after having a panic attack moments before his ring-walk and some have used it as explanation for his delayed entrance and father's reaction to the end of the fight. Joshua, who had been badly disorientated and knocked down four times during his brutal defeat at the hands of Ruiz Jnr, had to restrain his 'upset' father Robert as he tried to confront Hearn in the ring after the fight. Hearn responded to the rumour this week, saying on Twitter: 'Panic attack? I’ve heard all sorts of things - there was no issue at all going into the fight.' The Brit was badly disorientated during the fight and knocked down four times by Ruiz Jnr The Matchroom boss has also moved to dispel other rumours circulating, including that Joshua was knocked out in sparring just weeks before the fight. It has been claimed that he was dropped by Agit Kabayel, the European champion, which has also been held up as a reason why Joshua had marks on his face ahead of his knockout defeat by Ruiz. But Hearn told Sportsmail on Monday night that Joshua was not decked by any of his partners and that Kabayel was never involved in sparring. Joshua has also refused to make any excuses for his first defeat in the professional ranks, saying after the fight: 'I don't underestimate anyone. 'He's a decent puncher, decent fighter. It's his chance, isn't it? 'I always say that anyone who comes to box me boxes 15, 20 per cent better than what we've seen. 'It's funny because it's easy to overlook someone because of their shape or their record or whatnot, but these guys are coming to win. He's the better man tonight.' Joshua and Hearn confirmed their intent to enforce an immediate rematch set for either November or December time, to possibly take place in the UK after the Madison Square Garden dust-up. Hearn added: 'He's not the kind of guy to cry and sulk. He's going to go away, evaluate his performance and improve. 'He knows he should be beating Andy Ruiz. He wants the rematch but it's a must win now, it's all or nothing. 'Last night I saw a guy I knew wanted the belts back. This morning I saw a guy where that was the only thing on his mind, to become heavyweight champion of the world again.' Share or comment on this article: All rights reserved for this news site dailymail and under his responsibility