LUCKNOW, May 16 -- Chennai Super Kings' playoff hopes were dented after Lucknow Super Giants scripted a facile seven-wicket win on Friday. In his first season last year, LSG's mystery spinner Digvesh Rathi gained everyone's attention for his signature "notebook" celebration, where he mimicked writing down the name of a dismissed batter. On Friday too, yet another celebration style caught everyone's attention. This time it was LSG's left-arm pacer Akash Singh, who in his first match of the season, flashed out a note after taking a wicket. The note read: "#Akki on fire - Akash knows how to take wickets in a T20 game." This Bharatpur-boy did it thrice in the CSK innings after taking wickets of Sanju Samson, skipper Ruturaj Gaikwad and Urvil Pa...