Made from 81% Cabernet Sauvignon, 11% Cabernet Franc, and 8% Merlot, the 2020 Leoville Las Cases is deep garnet-purple in color. After a swirl or two, it erupts from the glass with explosive scents of blackcurrant cordial, stewed blackberries, juicy blackberries, and violets, leading to suggestions of licorice, cinnamon toast, and fertile loam with a touch of truffles. The medium-bodied palate is tightly wound with loads of nuanced black fruit, earthy, and floral layers, supported by very fine-grained tannins and seamless freshness, finishing long and multi-layered.

99 points, The Wine Independent (March 2023)

The 2020 Léoville Las Cases has developed into a powerhouse. Then again, that is Las Cases. En primeur, I thought the 2020 was a bit shy, but its true personality has to emerge. Blackberry jam, gravel, spice, menthol, licorice, espresso and plum all saturate the palate. Vivid and explosive, the 2020 is dizzyingly rich, with plenty of Las Cases tannins that will require patience. I am not sure when the 2020 will be ready to drink, but it won't be anytime soon. Las Cases is one of the wines of the vintage in 2020, that much is pretty clear.

98+ points, Vinous (December 2022)

81% Cabernet Sauvignon, 11% Cabernet Franc, 8% Merlot. Cask sample.
Very deep colour. Dense and reserved with an abundance of dark, ripe fruit. Tannins really very fine, providing length and persistence but no aggression. A measured wine with good concentration and a saline freshness but without the muscle seen some years. More St-Julien than Pauillac this year.

18 points, James Lawther, JancisRobinson.com (April 2021)

Another 2020 that's going to demand patience, the 2020 Château Léoville Las Cases is a Cabernet Sauvignon-dominated blend that includes 11% Cabernet Franc and 8% Merlot that was raised in 80% new French oak. It's a regal, medium to full-bodied, concentrated, flawlessly balanced 2020 with a pure core of cassis and darker currant fruits, a layered, seamless mouthfeel that carries substantial tannins, perfectly integrated oak, and subtle floral, mineral, and leafy herb nuances. Playing in the concentrated yet focused and structured style of the vintage, it's going to need a decade to hit the early phases of its prime drinking window and will have 50-75 years of longevity.

98 points, JebDunnuck.com (March 2023)

Richly textured from the first moment, pencil lead, cassis, black cherry, cigar box, liqourice and espresso, just waves of utterly gorgeous flavours. I highly recommend that if you can find a way to taste a young Las Cases, it is worth your time, because the bare bones of what it will become are there, and remain visible for a few years before the entire thing clamps shut for a decade or more, prising open only one chink at a time. There are edges of violet and smoked caramel here, revealing a generous Las Cases compared to many vintages, but it will close down like the rest do, surely as night follows day. 50% new oak. The alcohol level is 1% less than 2018 and 0.5% less than in 2019, 3.65ph, 34hl/ha yield.

97 points, JaneAnson.com (December 2022)

Another 2020 that's going to demand patience, the 2020 Château Léoville Las Cases is a Cabernet Sauvignon-dominated blend that includes 11% Cabernet Franc and 8% Merlot that was raised in 80% new French oak. It's a regal, medium to full-bodied, concentrated, flawlessly balanced 2020 with a pure core of cassis and darker currant fruits, a layered, seamless mouthfeel that carries substantial tannins, perfectly integrated oak, and subtle floral, mineral, and leafy herb nuances. Playing in the concentrated yet focused and structured style of the vintage, it's going to need a decade to hit the early phases of its prime drinking window and will have 50-75 years of longevity.

98 points, JebDunnuck.com (March 2023)

The 2020 Léoville Las Cases is a classic in the making, unwinding in the glass with aromas of cherries, cassis, loamy soil, violets and dark chocolate framed by a discreet touch of new oak. Full-bodied, broad and layered, it's rich and concentrated, with a deep core of fruit framed by sweet, powdery tannins and lively acids. Concluding with a long, resonant finish, it's built for the cellar.

97+ points, Wine Advocate (April 2023)