In 1995, she featured in Fed Cup ties for Great Britain against both Poland and the Czech Republic, in Murcia, Spain.

She competed regularly in the main draw of the Wimbledon Championships and once at the US Open in 1997, partnering Barbara Schett in the women's doubles.

Playing as a wildcard, Siddall took the first set off the seventh seeded Capriati, but was unable to secure the upset, as the young American came back to win in three.

[3] She was most successful in the mixed doubles draw at Wimbledon, with two appearances in the round of 16, both times with Danny Sapsford.

The only other occasion she partnered Sapsford at Wimbledon was in 1995 when she had to be carried off the court in a stretcher after fainting from heat exhaustion during their first round match, played in record temperatures.