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  Olsson, who lost to Reid in the final of last year's inaugural event, proved too strong for the Briton, prevailing 6-2 6-3 to reach the semi-finals.
  The Scot, who won singles gold at the Rio Paralympics, will compete in the doubles with England's Alfie Hewett.
  Hewett beat France's Nicolas Peifer 4-6 6-2 6-2 in his singles opener.
  The 19-year-old will play Argentina's Gustavo Fernandez, who he beat to win his first Grand Slam title at the French Open last month, in the semi-final.
  However fellow Britons Lucy Shuker and Jordanne Whiley were beaten by Japanese second seed Yui Kamiji and Dutchwomen Diede De Groot respectively in the women's draw.
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  The wheelchair finals could be played on the 2,000-capacity court three this year.
  Last year's were played on the far smaller court 17.
summary: Gordon Reid's defence of his Wimbledon wheelchair singles title ended in the first round as he lost to Sweden's Stefan Olsson.