Chelsea were made to work hard for a 2-2 draw with promoted Hull City at Stamford Bridge, with Joao Pedro’s second-half equaliser rescuing a point for Xabi Alonso’s side.As they have done so many times recently, Chelsea came racing out of the blocks, as Rogers scored in the seventh minute. Chelsea cleared from a Hull corner, and won the ball back high up the pitch. Cole Palmer fed the ball to Joao Pedro who in turn found Rogers on the left. The England forward drove at the defence before striking crisply with his left foot inside Konstantinos Tzolakis’ near post.Having been in total control, Chelsea suddenly found themselves behind, as Hull’s No 10 Mohamed Belloumi scored twice in six minutes. Both goals owed much to dismal defending from Alonso’s side.For the first, Jorrel Hato failed to deal with a cross, letting it bounce in the area, allowing Belloumi to finish with ease. The second came from a Hull corner, with Emi Martinez coming for the ball but failing to get to it. It looked like the Argentina keeper had got away with it when Semi Ajayi’s header came back off the bar, but Oli McBurnie did well to find Belloumi at the top of the box and the Algerian forward smashed it into the net, with the help of a deflection off Levi Colwill.Simon Johnson breaks down the key talking points from Stamford Bridge.Why do Chelsea keep losing control of games?Chelsea’s inability to control games from a winning position is an issue that neither Alonso nor his players seem able to change.A serious team does not keep giving opponents the opportunity to get back into the game as often as Chelsea do.The statistic of conceding in 20 straight Premier League games tells its own story. Every team they face will go into a fixture believing they have a chance of finding the net right now.But Chelsea have taken the lead in five of the six matches they have played this season and only League One club Luton Town — in the Carabao Cup — have failed to score to give them a contest.