Arsenal's Bruno Guimaraes Vows to Overhaul Penalty Technique After Miss

• Arsenal midfielder Bruno Guimaraes admits his penalty technique is flawed.
• Guimaraes' miss led to a shock Carabao Cup exit against League Two's Fleetwood Town.
• The Brazilian international faced scrutiny after the costly miss.
• Guimaraes vows to overhaul his penalty technique.
• The miss occurred during the Carabao Cup Fourth Round.