It was clear for all to see that Jose Mourinho had to switch things about at half-time at Burnley.
Tottenham were so far off their best in the opening period at Turf Moor and they deservedly trailed to Chris Wood's simple finish after a gaffe from Hugo Lloris.
Erik Lamela had tested Nick Pope with a shot from outside the area but there was very little else from the visitors as the England international barely had anything to do.
Mourinho duly took off Oliver Skipp and Tanguy Ndombele at the break as Giovani Lo Celso and Lucas Moura came on to try and turn the game in their favour.
Lo Celso's impact on proceedings was immediate as referee Jon Moss pointed to the penalty spot minutes later as Erik Lamela drew a foul from Ben Mee following a brilliant through ball from the Argentine.
The ex-Real Betis man was sensational after the break as he showed Spurs what they were missing in the first half by pulling the strings and dictating play.
Whereas Mourinho would normally have named him in the starting XI given his performances, he had no other choice but to give him a breather after a hectic schedule and the fact that his side take on RB Leipzig in the Champions League on Tuesday evening.
Lucas joined Lo Celso on the bench in Lancashire due to the amount of games he's played recently in the absence of both Harry Kane and Son Heung-min.
In and out of the team under Mauricio Pochettino following his move from Paris Saint-Germain in 2018, the Brazilian has featured in every game under Mourinho so far and it almost proved costly on Wednesday evening against Norwich as he asked to be substituted due to the fear of picking up an injury.
Left on the field any longer and he may have joined Kane and Son on the sidelines.
Having Lo Celso and Lucas on the bench meant that Mourinho could bring both on if required at Turf Moor, as was the case as they entered the fray at half-time with the team really struggling.
The introduction of Lucas may have just also planted a seed in Mourinho's head for where he sees him in his Tottenham team once everyone is fit.
There have been many games since his arrival at the club where he has failed to really make an impact from the start - obviously excluding that famous night in Amsterdam last May - and many believe he is better utilised as an impact sub.
The 27-year-old did cause the Burnley backline some trouble in the second half with his running and on another day he may have proved to be the difference between the sides.
Defenders don't really like coming one-on-one against Lucas due to his pace and trickery, even less so when they have tired legs in the closing stages of games.
Although Mourinho is a huge fan of the player given he tried to sign him during his time as Real Madrid boss, it's hard to see where he fits in his strongest XI once everyone is available.
Kane and Son are nailed on to start, with then Steven Bergwijn and Dele Alli likely to join them in attack.
However, that may all change come the summer as Mourinho is likely to bring in new players and a striker will be high up on his priority list.
There is no doubting Lucas' talents but using him as an impact sub going forward could really be of benefit to Mourinho and the squad.
It didn't come as a surprise to see the head coach waxing lyrical about Lo Celso after the game but he also highlighted the impact his fellow substitute had on proceedings.
"In the second half we had Lo Celso that wanted the ball all the time," he said in his post-match press conference.
"We had Lo Celso also with a fantastic selection of passes, I think he lost a dangerous ball minute 80 something. He was fantastic with the ball.
"Every time Lucas was dropping between the lines and they couldn't stop him.
"The difference was made by the players. The players made the difference."
Lucas definitely does make a difference coming on as a substitute for Spurs and it may well be a role we see him play more next season.
While the player will understandably want to start week in, week out for the side, the Brazilian coming off the bench could prove to be the deciding factor in games for the Lilywhites.
