Christine Ohuruogu set off for the World Championships in Osaka in confident mood, having made a winning return from a 12-month ban.
Ohuruogu will now join a training camp in Macau
The 23-year-old, whose ban for missing three out-of-competition tests expired last week, won the 200m at the Scottish National Championships on Sunday.
Ohuruogu won her 400m heat on Saturday but did not run in Sunday's final because she had a flight to catch.
However, she said it had been "a very productive" weekend.
"It's good to be racing at a low-key meeting where there has not been too much pressure," she said.
Ohuruogu, who will now join up with her fellow GB squad members at a training camp on Macau, said she was looking forward to the World Championships.
"This is what I trained for. I'm hoping it will pay off after all my hard work," said the Londoner, who was picked for the GB team for Osaka last week, a day after her ban expired.