Chelsea progressed to the semi-finals of the FA Cup on Sunday after overcoming Leicester with a narrow 1-0 away win thanks to a goal from Ross Barkley.
The result came after Frank Lampard made three substitutions at half-time, with Billy Gilmour one of the players coming off.
What was Gilmour's overall display like?
📷 Match Snapshot
The young Scot was by no means terrible against Leicester, earning a 6.6 FC Rating, but he was uncharacteristically lacklustre in his passing, with a completion rate of 83% which is low by his standards.
He lost possession six times in his 45 minutes of game time, but it wasn't just the fact he gave the ball away, but where he gave it away. On more than one occasion, he attempted a difficult, awkward pass across his own goal.
Leicester pounced each time to break forward into dangerous areas, but thankfully for Gilmour they were unable to take advantage of the chances.
He won the one tackle he attempted in the first half, but lost two out of the three duels he was involved in.
Gilmour also failed to complete a single dribble, put no crosses into the box, and didn't create any Big Chances.
Out of his 29 completed passes, just seven were sent into the final third.
Leicester 0-1 Chelsea: Full Player Ratings and Statistics
Substitute Barkley would eventually emerge as the Man of the Match with a 7.4 FC Rating after scoring the winner.
〽️ Rating Week-on-Week
❌ DECLINE
Gilmour did make a substitute appearance against Man City last week, but it was only for a minute or so and we don't rate performances so short.
Therefore, for his last significant appearance, we have to go back to March when he played the full 90 minutes as Chelsea decimated Everton with a 4-0 home win.
That was Gilmour's second match in a row, with the first being the FA Cup win over Liverpool, when he was one of Chelsea's star performers.
Against the Toffees, he scored a 7.4 FC Rating, with his score versus Leicester representing a decline in performance.
🗝️ Key Stats
Gilmour match stats
| Statistic | Value | Notes |
| FC Rating | 6.6 | |
| Mins Played | 45 | |
| Touches | 40 | |
| Completed Passes | 29 | |
| Final Third Passes | 7 | |
| Big Chances Created | 0 | |
| Duels Won | 1/3 |
What Next?
It is impossible to expect a player so young to be routinely excellent, and Gilmour can take heart from the fact that Mason Mount and Reece James, two of Chelsea's other young stars, were also substituted at half-time.
Frank Lampard has promised to put a shoulder around his players and explain the reasons for his decision, which was ultimately vindicated as Chelsea progressed.
Quite simply, it wasn't even a particularly bad day at the office for Gilmour, just not particularly effective. The key reason for his substitution will likely be the fact that two of his intercepted passes let to chances on goal for Leicester.
Billy Gilmour 
Ross Barkley 
Willian 
Jamie Vardy 
Mason Mount 
Reece James 
Chelsea 
Leicester 
Man City 
Man Utd 
Arsenal 
