An article of footwear, comprising: an upper; and a sole structure engaged with the upper, the sole structure including: a ground-engaging component (240, 840) including: (i) an upper-facing surface; and (ii) a ground-facing surface opposite the upper-facing surface, wherein at least the ground-facing surface includes a matrix structure, and wherein the matrix structure includes: (a) a heel region including a plurality of open heel support cells, (b) a midfoot region including a plurality of open midfoot support cells, and (c) a forefoot region including a plurality of closed forefoot support cells; and a midsole component located between at least a portion of the upper-facing surface of the ground-engaging component (240, 840) and the upper, wherein the midsole component includes at least one of a foam midsole element or a fluid-filled bladder (222a-222d), wherein the matrix structure includes polygon structures defining and surrounding at least some of the plurality of open cells and at least some of the plurality of closed forefoot support cells, wherein the polygon structures include polygon structures or shapes having from four to twelve sides, and wherein the ground-engaging component (240, 840) includes a heel support extending from the upper-facing surface, characterised in that the heel support includes a perimeter heel support wall that at least partially contains a sidewall of the midsole component in a heel area of the midsole component. an upper; and a sole structure engaged with the upper, the sole structure including: a ground-engaging component (240, 840) including: (i) an upper-facing surface; and (ii) a ground-facing surface opposite the upper-facing surface, wherein at least the ground-facing surface includes a matrix structure, and wherein the matrix structure includes: (a) a heel region including a plurality of open heel support cells, (b) a midfoot region including a plurality of open midfoot support cells, and (c) a forefoot region including a plurality of closed forefoot support cells; and a midsole component located between at least a portion of the upper-facing surface of the ground-engaging component (240, 840) and the upper, wherein the midsole component includes at least one of a foam midsole element or a fluid-filled bladder (222a-222d), wherein the matrix structure includes polygon structures defining and surrounding at least some of the plurality of open cells and at least some of the plurality of closed forefoot support cells, wherein the polygon structures include polygon structures or shapes having from four to twelve sides, and wherein the ground-engaging component (240, 840) includes a heel support extending from the upper-facing surface, characterised in that the heel support includes a perimeter heel support wall that at least partially contains a sidewall of the midsole component in a heel area of the midsole component. a ground-engaging component (240, 840) including: (i) an upper-facing surface; and (ii) a ground-facing surface opposite the upper-facing surface, wherein at least the ground-facing surface includes a matrix structure, and wherein the matrix structure includes: (a) a heel region including a plurality of open heel support cells, (b) a midfoot region including a plurality of open midfoot support cells, and (c) a forefoot region including a plurality of closed forefoot support cells; and (i) an upper-facing surface; and (ii) a ground-facing surface opposite the upper-facing surface, wherein at least the ground-facing surface includes a matrix structure, and wherein the matrix structure includes: (a) a heel region including a plurality of open heel support cells, (b) a midfoot region including a plurality of open midfoot support cells, and (c) a forefoot region including a plurality of closed forefoot support cells; and a midsole component located between at least a portion of the upper-facing surface of the ground-engaging component (240, 840) and the upper, wherein the midsole component includes at least one of a foam midsole element or a fluid-filled bladder (222a-222d), wherein the matrix structure includes polygon structures defining and surrounding at least some of the plurality of open cells and at least some of the plurality of closed forefoot support cells, wherein the polygon structures include polygon structures or shapes having from four to twelve sides, and wherein the ground-engaging component (240, 840) includes a heel support extending from the upper-facing surface, characterised in that the heel support includes a perimeter heel support wall that at least partially contains a sidewall of the midsole component in a heel area of the midsole component.