Rory McIlroy insists there is still ‘a lot of work to be done’ in his game despite racing into a share of the early lead at the PGA Tour’s BMW Championship.
Source: [Sky Sports](https://www.skysports.com/golf/news/12040/13575208/bmw-championship-rory-mcilroy-grabs-share-of-opening-round-lead-as-scottie-scheffler-makes-nightmare-start-in-st-louis)