System for producing a liquid coffee extract comprising: a single-use coffee capsule with a tearable extraction foil member for the preparation of a liquid coffee extract in a coffee preparation apparatus and a coffee preparation apparatus comprising an extraction unit comprising an extraction chamber formed by the arrangement of a water injection cage for injecting water in the capsule and a capsule extraction plate comprising a tearing portion of tearing surface area A2 with a plurality of tearing members for creating coffee flow orifices in the extraction foil member under the effect of the pressure of fluid in the capsule; said capsule comprising: - a cup-shaped body comprising a cavity containing a predetermined amount of roast and ground coffee; said cavity being defined by a bottom wall and a substantially tubular side wall; the side wall ending by a cavity opening delimited by an internal peripheral edge of the side wall in the direction opposed to the bottom wall, - an annular flange extending outwardly from the said internal edge of the side wall, and - a lid covering the opening being at least partially formed by the tearable extraction foil member; wherein the cavity of the capsule contains at least 6.9 grams of roast and ground coffee, preferably of from 7.0 to 12.0 grams of roast and ground coffee and, characterized in that: the cavity opening is arranged to have an opening surface area A1, measured at said internal peripheral edge, such that the ratio of the area A1 relative to the tearing portion surface area A2 of the extraction plate of the apparatus, is at least of 2.0, preferably comprised between 2.1 and 2.5, more preferably 2.2 and 2.4. a single-use coffee capsule with a tearable extraction foil member for the preparation of a liquid coffee extract in a coffee preparation apparatus and a coffee preparation apparatus comprising an extraction unit comprising an extraction chamber formed by the arrangement of a water injection cage for injecting water in the capsule and a capsule extraction plate comprising a tearing portion of tearing surface area A2 with a plurality of tearing members for creating coffee flow orifices in the extraction foil member under the effect of the pressure of fluid in the capsule; said capsule comprising: - a cup-shaped body comprising a cavity containing a predetermined amount of roast and ground coffee; said cavity being defined by a bottom wall and a substantially tubular side wall; the side wall ending by a cavity opening delimited by an internal peripheral edge of the side wall in the direction opposed to the bottom wall, - an annular flange extending outwardly from the said internal edge of the side wall, and - a lid covering the opening being at least partially formed by the tearable extraction foil member; - a cup-shaped body comprising a cavity containing a predetermined amount of roast and ground coffee; said cavity being defined by a bottom wall and a substantially tubular side wall; the side wall ending by a cavity opening delimited by an internal peripheral edge of the side wall in the direction opposed to the bottom wall, - an annular flange extending outwardly from the said internal edge of the side wall, and - a lid covering the opening being at least partially formed by the tearable extraction foil member; wherein the cavity of the capsule contains at least 6.9 grams of roast and ground coffee, preferably of from 7.0 to 12.0 grams of roast and ground coffee and, characterized in that: the cavity opening is arranged to have an opening surface area A1, measured at said internal peripheral edge, such that the ratio of the area A1 relative to the tearing portion surface area A2 of the extraction plate of the apparatus, is at least of 2.0, preferably comprised between 2.1 and 2.5, more preferably 2.2 and 2.4.