rtokens: " Yesterday was the toughest day I 've had for a long time , " Woods said . "
pos: PRP VBD IN DT NN CC DT JJ NN RB IN VBN PRP CD NNS IN DT NN .
tokens: He settled for a birdie and a four-under opening round that left him five shots off the pace .
ltokens: Woods , who turned pro Tuesday after winning an unprecedented third successive U.S. Amateur Championship , almost eagled the 18th hole .