In our latest JG challenge, Mikel Arteta and Emiliano Viviano put their heading skills to the test at London Colney.
Check out our video above by clicking the PLAY button.
Who do you think will win? You can vote below.
If you can think of a good challenge to submit to the players, then you should enter our JG challenge competition. Click here to find out more. Copyright 2016 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source