Ryan Harris' early impact with the new ball was a reminder to England of the threat posed by the veteran fast bowler.
After making a belated Test debut at the age of 30, Harris provides a 90mph cutting edge to Australia's attack - when he's been fit to take the field that is.
And therein lies the problem. The Sydney-born 33-year-old has played just 13 of a possible 37 Tests in that period due to injury problems, most notably chronic knee issues.
England knew what was coming when Harris was preferred to Mitchell Starc at Lord's as he had taken nine wickets at Perth in Australia's only win of the 2010/11 Ashes series.
But he sustained a stress fracture in his left ankle during the next Test in Melbourne and England won the final two matches of the series to earn a 3-1 victory.
Since then, his career has been stop-start and, with all five Tests in this series being squeezed into just over six weeks, Australia's management know Harris' workload must be managed sensibly to avoid another breakdown.
Conversion decline
Jonathan Trott has been a rock for England at No.3 since his debut in the final Test of the 2009 Ashes series, averaging close to 50.
But his dismissal for 58 on day one at Lord's continued a downward trend in turning 50 into 100 over the past two years.
When he scored the seventh of his nine Test hundreds, 112 against Sri Lanka in Galle in March 2012, Trott had an exceptional conversion rate of 47 per cent.
Since then, he has passed 50 on 11 occasions but has only twice gone on to a century - a conversion rate of 18 per cent.
