By Samuel Meade Bukayo Saka has been told his penalty was “not convincing” in Arsenal’s thrashing of Burnley at the weekend. The winger scored two of his side’s five at Turf Moor, including a first-half spot kick. His strike fired past James Trafford in the Burnley goal, but was perhaps not the most emphatic penalty Saka had ever hit. As a result, former Tottenham boss Tim Sherwood took aim at the winger for leaving Arsenal fans with “your heart in your mouth”. Saka has continued to be a shining light for the north Londoners as they seek to win the title for the first time in two decades. He r…