NOVELTY - Preparing a sugar product from lignocellulosic material, comprises: (a) optionally pre-treatment of the lignocellulosic material; (b) optionally washing the optionally pre-treated lignocellulosic material; (c) enzymatic hydrolysis of the optionally washed and/or optionally pre-treated lignocellulosic material using an enzyme composition comprising at least two cellulases and at least comprising glycoside hydrolase 61; and (d) optionally recovery of a sugar product.    USE - The process is useful for preparing a sugar product and a fermentation product from lignocellulosic material (all claimed), where the sugar product includes glucose, cellobiose, xylose, arabinose, galactose, fructose, mannose, rhamnose, ribose, galacturonic acid, glucoronic acid, hexoses and pentoses, the fermentation product includes biofuels (including biogas, ethanol and butanol), lactic acid, 3-hydroxy-propionic acid, acrylic acid, acetic acid, 1,3-propane-diol, ethylene, glycerol, a plastic, a specialty chemical, an organic acid (such as citric acid, succinic acid and maleic acid), a solvent, an animal feed supplement, a pharmaceutical (such as a beta -lactam antibiotic or a cephalosporin), a vitamin, an amino acid (such as lysine, methionine, tryptophan, threonine, and aspartic acid), an enzyme (such as a protease, a cellulase, an amylase, a glucanase, a lactase, a lipase, a lyase, an oxidoreductase, a transferase or a xylanase), and a chemical feedstock.    ADVANTAGE - The process rapidly and economically prepares the sugar product under optimal temperature conditions with high yield and reduced dosage of the cellulase enzyme.    DETAILED DESCRIPTION - Preparing a sugar product from lignocellulosic material, comprises: (a) optionally pre-treatment of the lignocellulosic material; (b) optionally washing the optionally pre-treated lignocellulosic material; (c) enzymatic hydrolysis of the optionally washed and/or optionally pre-treated lignocellulosic material using an enzyme composition comprising at least two cellulases and at least comprising glycoside hydrolase 61; and (d) optionally recovery of a sugar product, where during part of the time of the enzymatic hydrolysis, oxygen is added to the lignocellulosic material and during part of the time of the enzymatic hydrolysis less oxygen is added to the lignocellulosic material compared to the other part of the time of the enzymatic hydrolysis, preferably no oxygen is added to the lignocellulosic material. An INDEPENDENT CLAIM is included for a process-1 for the preparation of a fermentation product from lignocellulosic material, comprising the steps (a)-(c) as above per se, (d1) fermentation of the hydrolyzed lignocellulosic material to produce a fermentation product, and (e1) optionally recovery of a fermentation product.