By Tom Gott Chelsea needed a late header from Axel Disasi to snatch a 2-2 draw with Brentford on Saturday. The Blues were comfortable in the first half and were good value for the lead handed to them by Nicolas Jackson’s header, but Brentford upped their performance after the break as goals from Mads Roerslev and Yoane Wissa turned the game on its head. With the clock ticking down, Disasi popped up with a powerful header to save Chelsea from another disappointing defeat. How the game unfoldedIvan Toney saw a close-range volley blocked early on, before Wissa’s strike from the edge of the box lo…