Europa league 2019 20 luke shaw needs to keep up top form
I think there may be a few issues with your statement!
Firstly, the Europa League 2019-20 season has already taken place, and the final was played on August 21, 2020, between Sevilla and Inter Milan, with Sevilla winning 3-2.
Secondly, Luke Shaw is a left-back for Manchester United, not a striker, so he wouldn't be expected to keep up top form in the sense of scoring goals.
However, I assume you're referring to Luke Shaw's overall performance and form for Manchester United during the 2019-20 season, which did include the Europa League. Shaw has been a regular starter for Manchester United and has been praised for his defensive solidity and attacking contributions.
To keep up his top form, Shaw would likely need to continue working hard in training, focusing on his defensive positioning, tackling, and passing accuracy, as well as his ability to support Manchester United's attacks with his pace and delivery from the left flank.