By Jack Gallagher Things were looking up for Mauricio Pochettino’s Chelsea heading into their clash with Sheffield United on Sunday. The Blues were coming off the back of a season-best win over Man Utd at Stamford Bridge on Thursday, secured thanks to two added time goals from Cole Palmer, and extremely confident of bagging another three points up against the 20th-placed team in the Premier League. Heading into additional time, thanks to their 2-1 lead, Chelsea would’ve been even more confident of picking up a second win of the week, however in the 93rd minute Oli McBurnie capitalised on some …