Brazil made the eventual breakthrough seven minutes from time as Casemiro fired a wonderful half-volley home leaving Sommer with no chance.
So what did we learn from the game?
Neymar shifts the balance
It is tough to exactly replicate what he does on a football pitch, though, with Brazil seemingly slower and lacking quality without their star man.
The number 10 hobbled off in their victory against Serbia last week and is now likely to be back in the fold for the knockout stages after sharing a picture on social media of his badly swollen ankle.
This showed his reluctance to go with his plethora of attacking options from the start, even despite Switzerland looking shaky and unnerved in defensive situations.
As soon as Tite went for attacking changes with Rodrygo on for Paqueta and Bruno Guimares for Fred, the side looked much more balanced and quicker going forward.
There is certainly a case for going for a more positive team from the off against lesser opposition, which Brazil are likely to face should they get a point against Cameroon to come top of Group G.
This was the first time since his debut that Brazil had won a World Cup game without Neymar in the side, a clear sign that they can cope without him but just need to strike the balance right.
Brazil are serious contenders
If it was not clear already, Brazil are at the 2022 World Cup to win the trophy and nothing else.
A strong backline is always key to winning, with Tite wanting his side to keep a clean sheet first then go and score goals as shown by his aforementioned change with Fred coming in for Neymar.
Brazil are yet to concede a goal in their two games so far, with the last three winners conceding just six, four and two goals throughout the tournament.
Long may it continue for Tite and his players, with them showing all the defensive credentials to be a winner despite looking somewhat lacklustre up front at times.
The Swiss defence must improve
As time went on in the game, Switzerland allowed their opponents too much time in the half spaces and time in behind the full-backs.
Defenders Stefan Widmer, Manuel Akanji and Ricardo Rodriguez lost possession 19, 12 and 18 times respectively throughout the game - all too many times against high-class opposition attackers like Brazil's.
Widmer was caught on the back foot numerous times in the second half, with his average position actually higher than right winger Fabian Rieder whilst both were on the pitch together.
On one occasion this gave Vinicius Junior the freedom of the wing as he raced through and netted past Sommer only for the goal to be chalked off through a prior offside, no doubt to Widmer's relief.
Murat Yakin's side must show signs of improvement on Friday against a Serbia side that scored three goals in their second group game against Cameroon.
Brazil will need goals from all over
Casemiro's late winner was just his sixth international goal in 67 games, showing that Tite's open style of play could lead to Brazil players grabbing goals from all over the pitch in this tournament.
Defenders look likely to score with Raphinha putting a number of dangerous set-pieces, with an attacking player playing in the number 10 role always capable of scoring from long range, whether that be Paqueta, Rodrygo or Neymar when he returns.
Richarlison did not net against Switzerland, but his brace in the opening game shows that he can be relied upon as a source of goals in the tighter games that are likely to come in a few weeks time.
If Neymar's injury is set to persist, Tite will be missing his 75 goals for his country as well as their main creator.
Aside from Richarlison and his backup striker Gabriel Jesus, the rest of the Brazil attackers including Vinicius, Rodrygo, Raphinha, Gabriel Martinelli, Pedro and Antony have just 10 international goals in 59 caps between them.
Brazil got a goal from holding midfielder Casemiro in this tight game, and will likely need more of its kind if they are to come through such games as the tournament progresses.