The original Roman alphabet matches to the original Greek alphabet pretty well:
A Α
B Β
C Γ
D Δ
E Ε
F Ϝ
G —
— Ζ
H Η
— Θ
I ~ J Ι
K Κ
L Λ
M Μ
N Ν
— Ξ
O Ο
P Π
Q Ϙ
R Ρ
S Σ
T Τ
U ~ V Υ
— Φ
— Χ
— Ψ
— Ω
X (Ξ)
Y (Υ)
Z (Ζ)
The Greek equivalents of F and Q fell out of use. J and V are variants of original I and U, and appended after them. W, when it developed, was a variant of V, and appended after it. Ζ, Θ, Ξ, Φ, Χ, Ψ, Ω were left out of the original Roman alphabet—although as it turns out, Χ in the western Greek alphabet corresponded to Ξ in the eastern, so it was in the right kind of place. X, Y, Z were imports from Greek, and stuck on the end.
The only real oddity is G and Ζ being in the same position. G was invented in the Roman alphabet as a variant of C; the theory is that it was slotted in where Greek Ζ used to be, precisely because Greek Z had dropped out after F. See G
Cyrillic patterns closely to Greek too, if you allow for variants of letters being inserted in place, and new letters being appended at the end.
See early Cyrillic alphabet:
А Α
БВ Β
Г Γ
Д Δ
Е Ε
ЖЅЗ Ζ
И Η
— Θ
І Ι
К Κ
Л Λ
М Μ
Н Ν
— Ξ
О Ο
П Π
Р Π
С Σ
Т Τ
Ѹ Υ
Ф Φ
Х Χ
— Ψ
Ѡ Ω
ЦЧШЩЪЫЬѢЮꙖѤѦѨѪѬѮѰѲѴҀ
Б was inserted as a variant of Β. Ж and Ѕ were inserted as variants of З = Ζ. Θ, Ξ, Ψ were left out as unnecessary to Slavic, though there were then re-appended at the end, to transliterate Greek: ѮѰѲ. In fact the very last letter appended, Ҁ, was appended for Greek numerals: ϟ, koppa (which earlier looked like Ϙ).