Sheffield United manager Paul Heckinbottom praised his sides effort but believes a slight lack of quality let them down in their Yorkshire derby loss to Leeds. SUBSCRIBE TO AMAZON PRIME VIDEO SPORT: https://www.youtube.com/channel/UC1VU-FHvhbom5tPSCEB-e4g?sub_confirmation=1 Follow Amazon Prime Video Sport on Instagram: https://www.instagram.com/primevideosport/ Follow Amazon Prime Video Sport on Twitter: https://twitter.com/primevideouk