The race is on for Lakeside 5k Series honours after Nick Duggan bagged his second consecutive win last night.
Series leader James Baker finished fifth but his grip on the overall crown he has dominated for years could be in danger.
Three races of the five count towards the overall series standings.
Duggan is now a big threat for the title after his victory in a time of 15min 22sec.
Race director Peter Newton said: ‘Nick Duggan got his second win as expected but we didn’t expect James Baker to finish back in fifth.
‘He still holds onto his overall series lead because it is based on three races.
‘Nick has only done two but he could take the overall title if he turns up for either of the two remaining races.
‘It would be the first time James would have lost out in the series for many years.
‘He’s almost made it his own but now it is in the balance.’
Stubbington’s Daniel O’Boyle is also in the hunt for series glory after he finished second last night in a time of 15.46.
Havant’s Chris Spinks finished in excellent third place (15.48) and was the top under-20 runner.
Newton said: ‘Daniel has been running well and he’s improving as he gets more used to the 5k.
‘It’s a difficult distance because you do have to judge your pace quite well.
‘Chris Spinks put in a good performance. He finished very strongly.’
City of Portsmouth teenager Tom MacSwayne finished seventh overall (16.12) and was second under-20. Zack Lahlal was third under-20 (16.47).
Ted Yeates, another City of Portsmouth talent, was the first under-15 finisher with a cracking time of 17.04. Jacob O’Hara came second (18.15).
Eastleigh athlete Hannah Howard was the first female finisher (18.08).
Second place went to top junior Elizabeth Rose.
The City of Portsmouth youngster also won the under-15 category with her time of 18.24.
Her club-mate Anya Pigden was second under-15 (20.48).
Pete Turrell, from Denmead Striders, was first home in the veteran male 50 age group (17.54). City’s Reg Ball took the male 60 prize with a time of 19.36.