Better approach: to draw lines. Step-by-step Excel sheet: Row 1 : Title Row 2 : "Round 1" (merged A2:B2), "Quarterfinals" (merged C2:D2), "Semifinals" (merged E2:F2), "Final" (G2) Left side bracket:
| | A | B | C | D | E | F | G | |-|---|---|---|---|---|---|---| |3|Match 1| Team A | | QF1 | Winner M1 | | SF1 | Winner QF1 | | Final | Winner SF1 | |4| | Team B | | | Winner M5 (bye) | | | Winner QF2 | | | Winner SF2 | |5|Match 2| Team C | | QF2 | Winner M2 | | | | | | |6| | Team D | | | Winner M6 (bye) | | SF2 | Winner QF3 | | | |7|Match 3| Team E | | QF3 | Winner M3 | | | Winner QF4 | | | |8| | Team F | | | Winner M7 (bye) | | | | | | |9|Match 4| Team G | | QF4 | Winner M4 | | | | | | |10| | Team H | | | Winner M8 (bye) | | | | | | |11|(bye)| Team I | | | | | | | | | |12|(bye)| Team J | | | | | | | | | 10 team single elimination bracket excel
That’s what most people do.