  Measuring the properties of the intergalactic medium (IGM) and sources during
the Epoch of Reionization (EoR) is of immense importance. We explore the
prospects of probing the IGM and sources through redshifted 21-cm observations
of individual ionized bubbles surrounding known luminous sources during the
EoR. Accordingly, we simulate HI 21-cm maps, foreground contaminants and system
noise which are specific to the uGMRT and SKA1-Low observations. Following the
subtraction of the foreground from the total visibility, we employ a
visibility-based matched filter technique to optimally combine the desired HI
21-cm signal while minimizing the system noise. Our analysis suggests that
these ionized bubbles can be detected with more than $5 \sigma$ significance
using approximately $\sim 2000$ and $\sim 3000$ hours of observation time with
the uGMRT at redshift $7.1$ and $8.3$ respectively. The SKA1-Low should be able
to detect these with more than $8 \sigma$ significance using just $\sim 100$
hrs of observations. Further, we investigate the impact of the foreground
subtraction on the detectability and find the signal-to-noise ratio decreases
when smaller bandwidth is used. More importantly, we show that the matched
filtering method can measure ionized bubble radius and constrain HI-neutral
fraction reasonably well, helping deeper insights into source properties and
the intergalactic medium.
