Champions League 2019-20: 3 reasons why Barcelona completed a 2-1 comeback win over Inter Milan

#2 Ernesto Valverde's inspired changes

Valverde's substitutions positively affected the game

Under Antonio Conte's management, Inter Milan have been transformed into one of the form teams of the season. They are the trailblazers in the Italian league, having won all six of their games, scoring 13 goals and conceding just two.

The players have almost seamlessly adapted to his tactical demands and against Barcelona, they showed as much in what was an utterly dominating first-half performance.

The Nerazzurri played as a cohesive unit and constantly tore through the Barcelona backline with Stefano Sensi and Nicolo Barella running the show through the middle - almost as though Sergio Busquets wasn't there.

In response, Valverde took off the Spanish international and introduced Arturo Vidal in his stead while taking off another anonymous player in Antoine Griezmann and replacing him with the fit-again Ousmane Dembele.

Both players had almost immediate impact on the game. Vidal's introduction helped to steady the ship in the middle of the park, allowing Arthur to drop deep and influence proceedings. Vidal also had a direct hand in Barcelona's first goal, as it was he who set Suarez up with an assist on the edge of the box.

For his part, Dembele brought an urgency and vibrancy that were sorely lacking while Griezmann was present on the field. His direct running and pace also put the Inter back three on the back-foot, limiting Antonio Candreva's attacking contributions and forcing him to come back and help Diego Godin out with defending.

Valverde's tactical masterstroke in introducing Dembele and Vidal must be applauded.