https://www.reuters.com/article/us-deliveroo-outlook-ceo/deliveroo-ceo-we-have-a-lot-of-work-ahead-to-prove-ourselves-to-the-markets-idUSKBN2C20RT >The chief executive of Deliveroo said the company had a lot of work to do to prove itself to the market after its shares fell sharply when it listed last month.